I am editing a Wikipedia article about the Chen-Kao reaction that is used to identify ephedrine, but I am unable to find biographical info on C. H. Kao:
K.K. Chen and C.H. Kao - Ephedrine and Pseudoephedrine, their Isolation, Constitution, Isomerism, Properties, Derivatives and Synthesis - Journal of the American Pharmaceutical Association volume=15 issue=8 year=1926 pages=625–639
K.K. Chen and C.H. Kao, Pharm. Zentralhalle, Vol.70, p.27 (1929)