Tencent's headquarters in Shenzhen, China. CHEN XIAOTIE/VCG VIA GETTY IMAGES The word “donation” has become a charged topic for some disapproving investors in China's tech companies after the country's two biggest names, Alibaba and Tencent, each pledged no less than 50 billion yuan ($15 billion) over the past year to help with Beijing’s campaign for “common prosperity.” An exception, however, should be granted for Tencent's annual donation campaign in September. The compa...