At the beginning of January 2021, Hefei Urban and Rural Construction Bureau issued the Certificate of Class I Qualification for Professional Contracting of Environmental Protection Works to East China Engineering Science and Technology Co., Ltd., which marks that the Company has been formally entitled to the qualification. This is the highest grade of qualification in the professional contracting field of environmental protection works. It can undertake construction and contracting for various kinds of environmental protection works, including water pollution prevention and control works, air pollution prevention and control works, solid waste treatment and disposal works, physical pollution prevention and control works and pollution remediation works, etc.