Clampdown follows fatal stabbing of Chinese woman who tried to stop attack on Japanese mother and child

China’s internet companies have announced a crackdown on “extreme nationalism” online, particularly anti-Japanese sentiment, after a Chinese woman was fatally stabbed while protecting a Japanese mother and child in Suzhou.

Tencent and NetEase, two of the biggest firms, said at the weekend that they would be investigating and banning users who stirred up hatred.