Vincent Siew votes. On 11 April 2008, Vincent Siew departed Taiwan to attend the Boao Forum for Asia, held in Boao, Hainan, which is administered by mainland China. Siew is a founding delegate of the forum from 2001, and he attended once again in his capacity as chairman of the Cross-Straits Common Market Foundation. Siew had met with Chinese president Hu Jintao in Bo'ao in 2001. However, his special status as the vice president-elect in 2008 made his attendance more significant, but also more controversial in Taiwan. His meeting with Hu Jintao was the highest level exchange between Taiwan and mainland China
Hu Jintao is general protocol that Hu must have at least implicitly approved the use of force against protesters, whether he actually gave orders throughout 5 March is a matter of debate. In addition, John Tkacik cites that Hu had been coordinating with the Chengdu Military Region for troops to be on full alert as the situation progressed. Some diplomatic analysts linked what they saw as Hu's brutal use of force to the suppression of activists and students in Tiananmen Square, which took place three months later. Whether Hu provided "inspiration" for the PLA on 4 June is a matter of debate,