Sina Corp is an online Chinese media group operating Sina Weibo, a Chinese-language microblog loosely modelled on Twitter. Sina Weibo has more than half of the China market. Sina Corp also owns, which is the biggest Chinese language infotainment web portal, according to Wikipedia. 

The US regulator wants the audit papers of Chinese companies listed on US stock exchanges or it will delist them. Photo: Reuters

Accounting showdown

Without much public fanfare or even awareness except in the gloomy world of bean-counting accountants, China and the United States have embarked on yet another business collision course.