M. D. Chow

[5] To entertain his sick son Wei-Liang Chow in 1923, he brought home many colorful foreign stamps during his recuperation.

[8] Chinese stamps eventually became a gold medal contender in 1927 at the Strasbourg International Exhibition in France.

[3][4] He's the first Chinese to be granted a fellow of F.R.P.S.L., the Royal Philatelic Society London.

[3][4] In Yangzhou in 1900, he created Zhixin Math Club (知新算社) with Bao Mofen (包墨芬) and Yu Yudong (余雨东).

[9] In the 1920s, he created Science Society of China (中国科学社) with Ren Hongjuan (任鸿隽) and Hu Mingxia (胡明夏), and was named co-honorary president with Zhang Jian.