In March 1989, Xu was wounded in a
grenade training accident and sent to the
Beijing Military Region (BMR) Hospital in the capital. On 18 May,
President Yang Shangkun heard of Xu's refusal and could not sleep for days. He consulted with the
paramount leader,
Deng Xiaoping, who said that a soldier like Xu could not disobey the order. Xu was then arrested in the hospital and taken to be court martialled. According to
The Tiananmen Papers, Yang sent
Zhou Yibing, the commander of the BMR, to Baoding to persuade Xu. Xu asked Zhou whether the three principals of the
Central Military Commission had approved the martial law order. Zhou replied that while
Deng Xiaoping, the
chairman, and Yang Shangkun, the vice-chairman, had approved,
Zhao Ziyang, the first vice-chairman (and the
General Secretary of the CCP), had not. Without Zhao's approval, Xu refused to act on the order and asked for sick leave. His request was not granted but he still refused to report to duty. Xu's defiance fanned fears in the CCP of a rebellion among the military and heightened the belief that the student protesters were a serious threat that had to be eliminated. The 38th Group Army under new leadership proceeded to play a major role in suppressing the demonstrators. Many of Xu Qinxian's former colleagues were promoted for their roles. ==Trial and punishment==