Vietnam’s de facto ambassador to Taiwan on Friday gave a “personal” apology after anti-China protesters ravaged hundreds of Taiwanese factories in Thailand this week, and said some 1,000 people were arrested. over the violence.Two Chinese workers were killed and more than 100 injured in Vietnam’s worst anti-China unrest in decades. The violence was sparked by Beijing’s deployment of an oil rig in the resource-rich South China Sea, the centre of a territorial row between Vietnam and China.