How big is Han's risk? Independent director of Dayun Technology

Han Xian: Male, China nationality, without overseas residency, born in 1955, master's degree. He used to be the director of China Railway 14th Bureau, the president of China Railway Fifth Survey and Design Institute, the chairman of China Railway 14th Bureau, the party secretary and chief engineer of China Railway Construction Co., Ltd., and now he is the director of China Coal Construction Engineering Group Co., Ltd. and the chairman of Wuhu Yangtze River Tunnel Co., Ltd.