A man who angered millions of Chinese by insulting Nanjing Massacre and internet users that reported his inappropriate remarks has been detained for eight days, according to Nanjing police on Thursday.

The man surnamed Meng, 35, had been detained by Shanghai police for five days for saying in a WeChat group on Feb 22 that the 300,000-plus people believed to have been killed during the 1937 massacre deserved their fates.

On Saturday, Meng went to Nanjing from Shanghai after his release and filmed a video at the Memorial Hall for the Victims of the Nanjing Massacre by Japanese Invaders, in which he repeatedly insulted internet users who reported him to authorities.

On Monday, Meng gave himself up to Shanghai's Yangpu district police and acknowledged his illegal acts at the memorial hall in Nanjing. The next day he apologized to the public on Sina Weibo.

Meng was detained for eight days given that he had been detained within six months and showed regret during investigation, Nanjing’s Jianye district police said.