Further progress along the road to integrating Chinese and Western medicine...

Here's a paper from January 1979 reporting on the qinghaosu discovery. It was published in the Journal of New Medicine and Pharmacology. The headline reads:

在中西醫結合道路上乘勝前進－記青蒿素治疔瘧疾科研成果鑒定會

In other words:

Further progress along the road to integrating Chinese and Western medicine － Report of a meeting to appraise scientific research on qinghaosu as a cure for malaria

In fact this is an editorial introducing a series of articles on qinghaosu. It's the earliest mention I can find of qinghaosu as a cure for malaria (as I've discussed before, the 1977 paper doesn't mention the malaria part).