1. Imperial China: The Art of the Horse in Chinese History;Park,2000
2. Horse Racing and Equestrian Sports in Ancient China-Guangming Daily
https://epaper.gmw.cn/gmrb/html/2015-06/05/nw.D110000gmrb_20150605_4-16.htm
3. History of Horse Racing in Tianjin. Wikipedia
https://zh.wikipedia.org/w/index.php?title=%E5%A4%A9%E6%B4%A5%E8%B5%9B%E9%A9%AC%E5%8F%B2&oldid=62204904
4. Republic of China (1912–1949). Wikipedia
https://en.wikipedia.org/w/index.php?title=Republic_of_China_(1912%E2%80%931949)&oldid=1079703795
5. Hankow Chinese Merchants’ Association Jockey Club Coupons (i.e., Stock Certificates)
http://www.yangmingauction.com/goodsdetail.html?auctionid=S21121&code=29&page=1