By Liz Lee, Qiaoyi Li and Ryan Woo BEIJING (Reuters) -A magnitude-6.2 earthquake struck one of China’s poorest regions just before midnight on Monday, killing at least 127 people, injuring hundreds and bringing down mud houses in remote villages that never stood a chance. Chinese state media arriving at the sixth commune of Dahe village, one of the worst-hit areas in China’s northwestern Gansu province, found many houses were either at risk of collapse, or had already crumbled to the ground, especially homes built from earth and clay. “I’ve lived for more than 80 years and had never seen such …