D: Male, born in 1985, China nationality, without permanent residency abroad, with a master's degree. From 2009 to 20 10, Mr. Ding worked as a software engineer in Shanghai Hehe Information Technology Development Co., Ltd., a firmware engineer in Shanghai Micron Information Technology Co., Ltd. on 2010/and a competition manager on 2012. 20 12-20 14 was the senior firmware engineer of aisahua technology (Shanghai) co., ltd, and 20 14-20 17 was the senior application engineer of dialogue semiconductor industry company. From March 20 17 to June 2019, he served as the product application director of Hengxuan, and from March 20 1 19, he has served as the technology director and product application director of Hengxuan.