After their conflict with China in the South China Sea, Vietnamese govt allow 3 days of Free For All for local Vietnamese to attack Chinese factories.
These Chinese happened to come from Taiwan.
It is reported that Vietnamese police and fire engine are no way to be seen when Vietnamese attacked and burn factories.
Analysts from Taiwan said that Vietnam and China were putting their disagreement very low key. But after US Assistant Secretary Russel visited vietnam on the 7 May 2014. Vietnam started to raise their stake and serious conflict begin.