diff --git a/CEDA/economic/macro.py b/CEDA/economic/macro.py
index 4478969..e2f6495 100644
--- a/CEDA/economic/macro.py
+++ b/CEDA/economic/macro.py
@@ -1,6 +1,5 @@
 import pandas as pd
 import numpy as np
-import re
 import demjson
 import requests
 from fake_useragent import UserAgent
diff --git a/CEDA/economic/us.py b/CEDA/economic/us.py
new file mode 100644
index 0000000..8c025cd
--- /dev/null
+++ b/CEDA/economic/us.py
@@ -0,0 +1,364 @@
+import pandas as pd
+import numpy as np
+import requests
+from fake_useragent import UserAgent
+import io
+
+# Main Economic Indicators: https://alfred.stlouisfed.org/release?rid=205
+url = {
+    "fred_econ": "https://fred.stlouisfed.org/graph/fredgraph.csv?"
+}
+
+def gdp_quarterly(startdate="1947-01-01", enddate="2021-01-01"):
+    """
+    Full Name:  Gross Domestic Product
+    Description: Billions of Dollars, Quarterly, Seasonally Adjusted Annual Rate
+    Return: pd.DataFrame
+    """
+    tmp_url = url["fred_econ"]
+    ua = UserAgent()
+    request_header = {"User-Agent": ua.random}
+    request_params = {
+        "id": "GDP",
+        "cosd": "{}".format(startdate),
+        "coed": "{}".format(enddate)
+    }
+    r = requests.get(tmp_url, params = request_params, headers = request_header)
+    data_text = r.content
+    df = pd.read_csv(io.StringIO(data_text.decode('utf-8')))
+    return df
+
+def gdpc1_quarterly(startdate="1947-01-01", enddate="2021-01-01"):
+    """
+    Full Name: Real Gross Domestic Product
+    Description: Billions of Chained 2012 Dollars, Quarterly, Seasonally Adjusted Annual Rate
+    Return: pd.DataFrame
+    """
+    tmp_url = url["fred_econ"]
+    ua = UserAgent()
+    request_header = {"User-Agent": ua.random}
+    request_params = {
+        "id": "GDPC1",
+        "cosd": "{}".format(startdate),
+        "coed": "{}".format(enddate)
+    }
+    r = requests.get(tmp_url, params = request_params, headers = request_header)
+    data_text = r.content
+    df = pd.read_csv(io.StringIO(data_text.decode('utf-8')))
+    return df
+
+def oecd_gdp_monthly(startdate="1947-01-01", enddate="2021-01-01"):
+    """
+    Full Name: Real Gross Domestic Product
+    Description: Billions of Chained 2012 Dollars, Quarterly, Seasonally Adjusted Annual Rate
+    Return: pd.DataFrame
+    """
+    tmp_url = url["fred_econ"]
+    ua = UserAgent()
+    request_header = {"User-Agent": ua.random}
+    request_params = {
+        "id": "USALORSGPNOSTSAM",
+        "cosd": "{}".format(startdate),
+        "coed": "{}".format(enddate)
+    }
+    r = requests.get(tmp_url, params = request_params, headers = request_header)
+    data_text = r.content
+    df = pd.read_csv(io.StringIO(data_text.decode('utf-8')))
+    return df
+
+def payems_monthly(startdate="1939-01-01", enddate="2021-01-01"):
+    """
+    Full Name: All Employees, Total Nonfarm
+    Description: Thousands of Persons,Seasonally Adjusted, Monthly
+    Return: pd.DataFrame
+    """
+    tmp_url = url["fred_econ"]
+    ua = UserAgent()
+    request_header = {"User-Agent": ua.random}
+    request_params = {
+        "id": "PAYEMS",
+        "cosd": "{}".format(startdate),
+        "coed": "{}".format(enddate)
+    }
+    r = requests.get(tmp_url, params = request_params, headers = request_header)
+    data_text = r.content
+    df = pd.read_csv(io.StringIO(data_text.decode('utf-8')))
+    return df
+
+def unrate_monthly(startdate="1948-01-01", enddate="2021-01-01"):
+    """
+    Full Name: Unemployment Rate: Aged 15-64: All Persons for the United States
+    Description: Percent, Seasonally Adjusted, Monthly, Quarterly and Annually
+    Return: pd.DataFrame
+    """
+    tmp_url = url["fred_econ"]
+    ua = UserAgent()
+    request_header = {"User-Agent": ua.random}
+    request_params = {
+        "id": "LRUN64TTUSM156S",
+        "cosd": "{}".format(startdate),
+        "coed": "{}".format(enddate)
+    }
+    r = requests.get(tmp_url, params = request_params, headers = request_header)
+    data_text = r.content
+    df_monthly = pd.read_csv(io.StringIO(data_text.decode('utf-8')))
+    df_monthly["DATE"] = pd.to_datetime(df_monthly["DATE"], format="%Y-%m-%d")
+    ua = UserAgent()
+    request_header = {"User-Agent": ua.random}
+    request_params = {
+        "id": "LRUN64TTUSQ156S",
+        "cosd": "{}".format(startdate),
+        "coed": "{}".format(enddate)
+    }
+    r = requests.get(tmp_url, params = request_params, headers = request_header)
+    data_text = r.content
+    df_quarterly = pd.read_csv(io.StringIO(data_text.decode('utf-8')))
+    df_quarterly["DATE"] = pd.to_datetime(df_quarterly["DATE"], format="%Y-%m-%d")
+    ua = UserAgent()
+    request_header = {"User-Agent": ua.random}
+    request_params = {
+        "id": "LRUN64TTUSA156S",
+        "cosd": "{}".format(startdate),
+        "coed": "{}".format(enddate)
+    }
+    r = requests.get(tmp_url, params = request_params, headers = request_header)
+    data_text = r.content
+    df_annually = pd.read_csv(io.StringIO(data_text.decode('utf-8')))
+    df_annually["DATE"] = pd.to_datetime(df_quarterly["DATE"], format="%Y-%m-%d")
+    df = pd.merge_asof(df_monthly, df_quarterly, on = "DATE", direction = "backward")
+    df = pd.merge_asof(df, df_annually, on = "DATE", direction = "backward")
+    df.columns = ["Date", "UR_Monthly", "UR_Quarterly", "UR_Annually"]
+    return df
+
+def pce_monthly(startdate="1959-01-01", enddate="2021-01-01"):
+    """
+    Full Name: PCE
+    Description: Percent, Monthly, Seasonally Adjusted
+    Return: pd.DataFrame
+    """
+    tmp_url = url["fred_econ"]
+    ua = UserAgent()
+    request_header = {"User-Agent": ua.random}
+    request_params = {
+        "id": "PCE",
+        "cosd": "{}".format(startdate),
+        "coed": "{}".format(enddate)
+    }
+    r = requests.get(tmp_url, params = request_params, headers = request_header)
+    data_text = r.content
+    df = pd.read_csv(io.StringIO(data_text.decode('utf-8')))
+    return df
+
+def cpi(startdate="1960-01-01", enddate="2021-01-01"):
+    """
+    Full Name: Consumer Price Index: Total All Items for the United States
+    Description: Percent, Monthly, Quarterly and Annually, Seasonally Adjusted
+    Return: pd.DataFrame
+    """
+    tmp_url = url["fred_econ"]
+    ua = UserAgent()
+    request_header = {"User-Agent": ua.random}
+    request_params = {
+        "id": "CPALTT01USM661S",
+        "cosd": "{}".format(startdate),
+        "coed": "{}".format(enddate)
+    }
+    r = requests.get(tmp_url, params = request_params, headers = request_header)
+    data_text = r.content
+    df_monthly = pd.read_csv(io.StringIO(data_text.decode('utf-8')))
+    df_monthly["DATE"] = pd.to_datetime(df_monthly["DATE"], format="%Y-%m-%d")
+    ua = UserAgent()
+    request_header = {"User-Agent": ua.random}
+    request_params = {
+        "id": "CPALTT01USQ661S",
+        "cosd": "{}".format(startdate),
+        "coed": "{}".format(enddate)
+    }
+    r = requests.get(tmp_url, params = request_params, headers = request_header)
+    data_text = r.content
+    df_quarterly = pd.read_csv(io.StringIO(data_text.decode('utf-8')))
+    df_quarterly["DATE"] = pd.to_datetime(df_quarterly["DATE"], format="%Y-%m-%d")
+    ua = UserAgent()
+    request_header = {"User-Agent": ua.random}
+    request_params = {
+        "id": "CPALTT01USA661S",
+        "cosd": "{}".format(startdate),
+        "coed": "{}".format(enddate)
+    }
+    r = requests.get(tmp_url, params = request_params, headers = request_header)
+    data_text = r.content
+    df_annually = pd.read_csv(io.StringIO(data_text.decode('utf-8')))
+    df_annually["DATE"] = pd.to_datetime(df_quarterly["DATE"], format="%Y-%m-%d")
+    df = pd.merge_asof(df_monthly, df_quarterly, on = "DATE", direction = "backward")
+    df = pd.merge_asof(df, df_annually, on = "DATE", direction = "backward")
+    df.columns = ["Date", "CPI_Monthly", "CPI_Quarterly", "CPI_Annually"]
+    return df
+
+def m1(startdate="1960-01-01", enddate="2021-01-01"):
+    """
+    Full Name: Consumer Price Index: M3 for the United States
+    Description: Growth Rate Previous Period, Monthly, Quarterly and Annually, Seasonally Adjusted
+    Return: pd.DataFrame
+    """
+    tmp_url = url["fred_econ"]
+    ua = UserAgent()
+    request_header = {"User-Agent": ua.random}
+    request_params = {
+        "id": "MANMM101USM657S",
+        "cosd": "{}".format(startdate),
+        "coed": "{}".format(enddate)
+    }
+    r = requests.get(tmp_url, params = request_params, headers = request_header)
+    data_text = r.content
+    df_monthly = pd.read_csv(io.StringIO(data_text.decode('utf-8')))
+    df_monthly["DATE"] = pd.to_datetime(df_monthly["DATE"], format="%Y-%m-%d")
+    ua = UserAgent()
+    request_header = {"User-Agent": ua.random}
+    request_params = {
+        "id": "MANMM101USQ657S",
+        "cosd": "{}".format(startdate),
+        "coed": "{}".format(enddate)
+    }
+    r = requests.get(tmp_url, params = request_params, headers = request_header)
+    data_text = r.content
+    df_quarterly = pd.read_csv(io.StringIO(data_text.decode('utf-8')))
+    df_quarterly["DATE"] = pd.to_datetime(df_quarterly["DATE"], format="%Y-%m-%d")
+    ua = UserAgent()
+    request_header = {"User-Agent": ua.random}
+    request_params = {
+        "id": "MANMM101USA657S",
+        "cosd": "{}".format(startdate),
+        "coed": "{}".format(enddate)
+    }
+    r = requests.get(tmp_url, params = request_params, headers = request_header)
+    data_text = r.content
+    df_annually = pd.read_csv(io.StringIO(data_text.decode('utf-8')))
+    df_annually["DATE"] = pd.to_datetime(df_quarterly["DATE"], format="%Y-%m-%d")
+    df = pd.merge_asof(df_monthly, df_quarterly, on = "DATE", direction = "backward")
+    df = pd.merge_asof(df, df_annually, on = "DATE", direction = "backward")
+    df.columns = ["Date", "M1_Monthly", "M1_Quarterly", "M1_Annually"]
+    return df
+
+
+def m3(startdate="1960-01-01", enddate="2021-01-01"):
+    """
+    Full Name: Consumer Price Index: M3 for the United States
+    Description: Growth Rate Previous Period, Monthly, Quarterly and Annually, Seasonally Adjusted
+    Return: pd.DataFrame
+    """
+    tmp_url = url["fred_econ"]
+    ua = UserAgent()
+    request_header = {"User-Agent": ua.random}
+    request_params = {
+        "id": "MABMM301USM657S",
+        "cosd": "{}".format(startdate),
+        "coed": "{}".format(enddate)
+    }
+    r = requests.get(tmp_url, params = request_params, headers = request_header)
+    data_text = r.content
+    df_monthly = pd.read_csv(io.StringIO(data_text.decode('utf-8')))
+    df_monthly["DATE"] = pd.to_datetime(df_monthly["DATE"], format="%Y-%m-%d")
+    ua = UserAgent()
+    request_header = {"User-Agent": ua.random}
+    request_params = {
+        "id": "MABMM301USQ657S",
+        "cosd": "{}".format(startdate),
+        "coed": "{}".format(enddate)
+    }
+    r = requests.get(tmp_url, params = request_params, headers = request_header)
+    data_text = r.content
+    df_quarterly = pd.read_csv(io.StringIO(data_text.decode('utf-8')))
+    df_quarterly["DATE"] = pd.to_datetime(df_quarterly["DATE"], format="%Y-%m-%d")
+    ua = UserAgent()
+    request_header = {"User-Agent": ua.random}
+    request_params = {
+        "id": "MABMM301USA657S",
+        "cosd": "{}".format(startdate),
+        "coed": "{}".format(enddate)
+    }
+    r = requests.get(tmp_url, params = request_params, headers = request_header)
+    data_text = r.content
+    df_annually = pd.read_csv(io.StringIO(data_text.decode('utf-8')))
+    df_annually["DATE"] = pd.to_datetime(df_quarterly["DATE"], format="%Y-%m-%d")
+    df = pd.merge_asof(df_monthly, df_quarterly, on = "DATE", direction = "backward")
+    df = pd.merge_asof(df, df_annually, on = "DATE", direction = "backward")
+    df.columns = ["Date", "M3_Monthly", "M3_Quarterly", "M3_Annually"]
+    return df
+
+def ltgby(startdate="1955-01-01", enddate="2021-01-01"):
+    """
+    Full Name: Long-Term Government Bond Yields: 10-year: Main (Including Benchmark) for the United States
+    Description: Percent,Not Seasonally Adjusted, Monthly, Quarterly and Annually
+    Return: pd.DataFrame
+    """
+    tmp_url = url["fred_econ"]
+    ua = UserAgent()
+    request_header = {"User-Agent": ua.random}
+    request_params = {
+        "id": "IRLTLT01USM156N",
+        "cosd": "{}".format(startdate),
+        "coed": "{}".format(enddate)
+    }
+    r = requests.get(tmp_url, params = request_params, headers = request_header)
+    data_text = r.content
+    df_monthly = pd.read_csv(io.StringIO(data_text.decode('utf-8')))
+    df_monthly["DATE"] = pd.to_datetime(df_monthly["DATE"], format="%Y-%m-%d")
+    ua = UserAgent()
+    request_header = {"User-Agent": ua.random}
+    request_params = {
+        "id": "IRLTLT01USQ156N",
+        "cosd": "{}".format(startdate),
+        "coed": "{}".format(enddate)
+    }
+    r = requests.get(tmp_url, params = request_params, headers = request_header)
+    data_text = r.content
+    df_quarterly = pd.read_csv(io.StringIO(data_text.decode('utf-8')))
+    df_quarterly["DATE"] = pd.to_datetime(df_quarterly["DATE"], format="%Y-%m-%d")
+    ua = UserAgent()
+    request_header = {"User-Agent": ua.random}
+    request_params = {
+        "id": "IRLTLT01USA156N",
+        "cosd": "{}".format(startdate),
+        "coed": "{}".format(enddate)
+    }
+    r = requests.get(tmp_url, params = request_params, headers = request_header)
+    data_text = r.content
+    df_annually = pd.read_csv(io.StringIO(data_text.decode('utf-8')))
+    df_annually["DATE"] = pd.to_datetime(df_quarterly["DATE"], format="%Y-%m-%d")
+    df = pd.merge_asof(df_monthly, df_quarterly, on = "DATE", direction = "backward")
+    df = pd.merge_asof(df, df_annually, on = "DATE", direction = "backward")
+    df.columns = ["Date", "ltgby_Monthly", "ltgby_Quarterly", "ltgby_Annually"]
+    return df
+
+def gdp_ipd(startdate="1955-01-01", enddate="2021-01-01"):
+    """
+    Full Name: Long-Term Government Bond Yields: 10-year: Main (Including Benchmark) for the United States
+    Description: Percent,Not Seasonally Adjusted, Monthly, Quarterly and Annually
+    Return: pd.DataFrame
+    """
+    tmp_url = url["fred_econ"]
+    ua = UserAgent()
+    request_header = {"User-Agent": ua.random}
+    request_params = {
+        "id": "USAGDPDEFQISMEI",
+        "cosd": "{}".format(startdate),
+        "coed": "{}".format(enddate)
+    }
+    r = requests.get(tmp_url, params = request_params, headers = request_header)
+    data_text = r.content
+    df_quarterly = pd.read_csv(io.StringIO(data_text.decode('utf-8')))
+    df_quarterly["DATE"] = pd.to_datetime(df_quarterly["DATE"], format="%Y-%m-%d")
+    ua = UserAgent()
+    request_header = {"User-Agent": ua.random}
+    request_params = {
+        "id": "USAGDPDEFAISMEI",
+        "cosd": "{}".format(startdate),
+        "coed": "{}".format(enddate)
+    }
+    r = requests.get(tmp_url, params = request_params, headers = request_header)
+    data_text = r.content
+    df_annually = pd.read_csv(io.StringIO(data_text.decode('utf-8')))
+    df_annually["DATE"] = pd.to_datetime(df_quarterly["DATE"], format="%Y-%m-%d")
+    df = pd.merge_asof(df_quarterly, df_annually, on = "DATE", direction = "backward")
+    df.columns = ["Date", "gdp_ipd_Quarterly", "gdp_ipd_Annually"]
+    return df
diff --git a/README.md b/README.md
index 5087043..19ef230 100644
--- a/README.md
+++ b/README.md
@@ -11,4 +11,6 @@ This is a data collecting project, with both `python` and `R`
 ## Acknowledgement
 
 * Thanks [akshare](https://github.com/jindaxiang/akshare/)
-* Thanks [EastMoney](https://www.eastmoney.com)
\ No newline at end of file
+* Thanks [EastMoney](https://www.eastmoney.com)
+
+https://fred.stlouisfed.org/graph/fredgraph.csv?id=GDP&cosd=1947-01-01&coed=2021-01-01
\ No newline at end of file