Xiaomi's CEO Lei Jun pledges $28 billion for core R&D over 5 years, doubling past investment. At Beijing's smart car factory, a SU7 rolls off lines every 76 seconds with 100% automation in key processes. Supported by Beijing's policies, the factory was built in 14 months. The YU7 model launches end-June, with sales starting July. (Photo/China Youth Daily)

By Wang Xinyuan,Wang Ziyuan,Jiang Xinyi(intern) and Zhang Yi/China Youth Daily

来源：中国青年报客户端