After practicing law, Zhu has been engaged in various litigation and arbitration legal affairs, and specializes in the defense of important and major criminal cases and litigation in the field of construction engineering. He has handled a series of influential major cases such as the bribery of Liu Ruiyang, deputy director of the Vehicle Department of the Transportation Bureau of the Ministry of Railways, the bribery of Ma Li, deputy general manager of the Data Department of China Mobile, the bribery of Zhong Qiangnian, deputy director of the State-owned Assets Supervision and Administration Commission of the People’s Government of Beijing Municipality, the corruption of Cao Shujie, deputy director of the General Office of the Ministry of Human Resources and Social Security, the loan fraud of Zhongdan Guarantee Company, the smuggling of grand pianos of Beijing Wuzhou Huacai Company, and the QVOd case.