By Yew Lun Tian and Laurie Chen BEIJING (Reuters) -A sweeping purge of Chinese generals has weakened the People’s Liberation Army, exposing deep-rooted corruption that could take more time to fix and slow Chinese leader Xi Jinping’s military modernization drive amid geopolitical tensions, analysts say. China’s top lawmakers senior military officers from the national legislative body on Friday, state media reported, a step that typically precedes further punishment for wayward cadres. Many of these were from the Rocket Force – a key arm of the PLA overseeing tactical and nuclear missiles. The p…