The board of directors of Doumob announced that on 25 March 2024, Mr. Wang Yingzhe has tendered his resignation as an independent non-executive director due to personal affairs and ceased to be the members of the Company's audit committee, nomination committee and remuneration committee of the Company with effect from 29 March 2024. The Board announced that Mr. Zhang Limin has been appointed as an independent non-executive director, a member of the audit committee, nomination committee and remuneration committee of the Company, with effect from 29 March 2024. Mr. Zhang Limin, aged 66.

During the period between July 1982 and February 1987, Mr. Zhang worked at the China University of Petroleum, and his last position was lecturer. From February 1987 to June 1997, Mr. Zhang worked at Yantai University as deputy director and director of student work department. From June 1997 to June 1998, Mr. Zhang served as a vice president of the Weihai Vocational College.

From June 1998 to February 2003, Mr. Zhang served as the director of the Weihai Municipal Government Office Jinan Branch. From February 2003 to January 2007, Mr. Zhang served as a deputy secretary general of the Weihai Municipal Government. From January 2007 to May 2012, Mr. Zhang served as the director of the foreign affairs office of Weihai City.

From May 2012 to March 2018, Mr. Zhang served as the secretary of the Party Committee of Shandong Pharmaceutical and Food Vocational College. Mr. Zhang obtained a bachelor's degree in petroleum storage and transportation from the China University of Petroleum in July 1982. Mr. Zhang obtained a master's degree in administrative management from Jilin University in July 1996.