File structure:
├───CleanData //Clean data from 201304 to 202305.
├───Doc //Documents and helpful informations.
├───Demo //Demo folder for test codes.
├───Lib //Keep basic dictionaries for convenience sake.
├───logfiles //Keep logging for data cleansing and processing.
├───NewCleanData //Clean data from 197901 to 201303.
├───OrderedData //Data processed and refined according to one's need.
└───Source //Temporary reposit for raw source data.
data_cleasing.py //Clean data located in Source to NewCleanData
data_processing.py //Process clean data to OrderedData.