At the Cosatu protest against state capture and corruption last Wednesday, marchers stopped outside the Johannesburg City Council to hand over a memorandum to Mayor Herman Mashaba. The mayor was not available to come and sign the memorandum himself, and sent Sun to stand in for him.

News24 heard marchers call Sun a "fong kong", and tell him to go back to China. Sun is a South African-born citizen of Chinese descent.
The crowd, as well as an official who accepted the memorandum, did not give Sun a chance to speak. Sun stood in silence as more offensive slurs were thrown his way, while South African Communist Party (SACP) secretary general Blade Nzimande looked on, along with other leaders.

The crowd also mimicked sounds made in Kung Fu movies during fights.

When Sun was signing the memorandum, some in the crowd shouted that he should not sign in Chinese. They also said that Mashaba had sent Sun - who a Cosatu official referred to as "Mr Lee" - because he was scared of workers and had therefore sent someone who knew karate.
They called Mashaba a sell-out. Mashaba threatened to take the organisations to the South African Human Rights Commission (SAHRC) if they did not apologise by Sunday.
Cosatu came out on Tuesday morning, apologising for any embarrassment and hurt caused by the derogatory statements.

Source: News24