What is the title of Han Zisen's book? Director of Saixiang Technology

Mr. Han Zisen: Born in 1963, China nationality, without permanent residency abroad, bachelor degree, senior engineer. He has served as a technical cadre of Tianjin Dacheng Hardware Factory, assistant engineer of Tianjin No.1 Rubber Products Factory, deputy director and engineer of technical transformation department of Tianjin Dolphin Rubber Group Co., Ltd., director of Tianjin Wanxiang Rubber & Plastic Machinery Co., Ltd., assistant, director and deputy general manager of Tianjin Saixiang Technology Co., Ltd., and is currently the legal representative of Tianjin Saixiang Rongtong Microfinance Co., Ltd. Saixiang Xincheng International Financial Leasing Co., Ltd., legal representative of Tianjin Saixiang Commercial Factoring Co., Ltd., chairman of Guangzhou Jingyuan Mechanical and Electrical Equipment Co., Ltd., director and executive deputy general manager of the company.