Data compiled by the Chinese Government Bureau of Economic Information, including: 

• a list of cultivating provinces in China;
• returns for exports in 1921(data from the customs)
• export destinations from Qingdao
• list of owner of mills (mostly Chinese and Japanese companies) with their capital, number of employees and annual output
• soya bean production in China, by provinces (after the Industrial Magazine, June 12, 1922, report taken from Japanese sources)
• list of beancakes producing firms in Dairen (Dalian, Manchuria) in January-June 1921
• Oil mills in Hankou and Dalian