SINGAPORE (AFP) - China's military build-up is purely defensive, the deputy chief of the world's biggest standing army said Saturday, amid US concerns over Beijing's intentions. "Strategically, we adhere to self-defence and would win only by striking after the enemy has struck," Lieutenant General Zhang Qinsheng, deputy chief of the general staff of the People's Liberation Army (PLA), told an international defence forum in Singapore. "China shall never fire the first shot. Such an approach is consistent with the ancient Chinese thought to use caution before getting into a war, use force only for a just cause, put people first...