Zhao Jianjun was born in February 1972 in Juancheng County, Shandong Province. He joined the Chinese Communist Party in June 1992 and began working in July 1994. He previously held positions including Director of the Policy and Regulations Division of the Shandong Provincial Financial Affairs Office, Director of the First Secretariat Division of the General Office of the Jiangsu Provincial Government, and deputy director of the Jiangsu Provincial Emergency Management Office.[3]
In September 2015, Zhao was appointed deputy director and member of the Party Leadership Group of the Jiangsu Provincial Development and Reform Commission. In August 2019, he became Deputy Secretary-General of the Jiangsu Provincial Government and a member of the Party Leadership Group of the General Office.[4]
In April 2020, Zhao was named Director and Chinese Communist Party Committee Secretary of the Jiangsu Provincial Department of Commerce. In July 2021, he was transferred to Wuxi to serve as Chinese Communist Party Deputy Committee Secretary, Vice Mayor, Acting Mayor, and Party Secretary of the Municipal Government. In March 2022, he was confirmed as Mayor of Wuxi and concurrently headed the Municipal Science and Technology Innovation Committee.[5]
In July 2025, Zhao was appointed Secretary-General of the People's Government of Jiangsu Province and a member of its Party Leadership Group. Zhao Jianjun is a delegate to the 14th National People's Congress and a member of the 14th Jiangsu Provincial Committee of the Chinese Communist Party. He has also served as a deputy to the 13th and 14th Jiangsu Provincial People's Congresses.[6]