Dear investors, in December 2021, the company won the bid for five bid sections of Donghua Engineering Technology Co., Ltd. Xizang Zabuye Salt Lake Green Comprehensive Development and Utilization of Ten Thousand Tons Battery grade Lithium Carbonate Project. The company will disclose information on the number of shareholders at the corresponding end of the period in its regular reports. For the number of shareholders for undisclosed months, investors are kindly requested to call the company's board office at 010-67986889 and provide relevant shareholder identification documents for inquiry.

Dear investor: Hello, the company won the bid for 5 sections of the 10000 ton battery grade lithium carbonate project for the green comprehensive development and utilization of Zhabuye Salt Lake in Tibet by Donghua Engineering Technology Co., Ltd. in December 2021, with a total amount of 273 million yuan, accounting for 47.07% of the company's audited main business income in 2020. In terms of lithium extraction from salt lakes, the company has the advantage of technological leadership and engineering application of core technologies through years of research and project experience in high salt water separation technology, thereby achieving efficient and low-cost operational results. It will have a positive impact on the company's future performance and business expansion.

Dear investor: Hello, our company can provide customers with lithium related technical solutions, process packages, equipment, and construction and operation services. We do not have lithium mining resources.

Dear investor: Hello, the company's main business focuses on the reuse of sewage resources and the deep treatment of industrial high difficulty wastewater. The main companies in the same industry include Jiuwu High tech, Lanxiao Technology, Shanghai Xiba, Sanda Film, etc. At present, most enterprises have a wide range of business scope and strong comprehensiveness, but each company has different business focuses and industrial chain links with relative competitive advantages. The company's main competitive advantage lies in its strong independent research and development capabilities and rich operation and maintenance experience. It can customize treatment according to different water quality characteristics and has successfully extracted sodium sulfate, sodium chloride, sodium carbonate, lithium salts, etc. from high salt wastewater. It is in a leading position in the field of wastewater resource utilization. For detailed information, please refer to the prospectus and periodic reports disclosed by the company in the information disclosure media formulated by the China Securities Regulatory Commission.

Dear investor: Hello, Yongrun Tiancheng, a wholly-owned subsidiary of the company, mainly engages in wholesale (without storage) of 35 hazardous chemicals including toluene, acetone, hydrochloric acid, sulfuric acid, liquefied petroleum gas, methane, methanol, dimethyl ether, solvent oil [closed cup flash point ≤ 60 ℃>], kerosene, coal tar, naphtha, petroleum crude oil, etc.; sales of chemical products (excluding precursor and hazardous chemicals), plastic raw materials, liquid paraffin; sales and after-sales service of technology promotion and environmental water treatment equipment; technical consulting; general contracting of engineering projects; engineering survey and design; construction project management; operation contracting of environmental protection engineering projects; membrane cleaning services; sales of water treatment filtration equipment and consumables such as membrane components, filter cartridges, and spare parts.

Dear investor: Hello, the by-products such as sodium carbonate, sodium chloride, and sodium sulfate extracted by the company in the project of providing comprehensive water treatment solutions to customers are sold externally by customers. In the lithium extraction project, the company can provide process packages, equipment, project construction, operation and maintenance, etc. The extracted battery grade lithium carbonate and other materials belong to the owner. Thank you for your attention.

Dear investor: Hello, the company has signed a relevant contract with Donghua Engineering Technology Co., Ltd. for this project, with a total project amount of 273 million yuan. Currently, the project is proceeding in an orderly manner according to the relevant plan. Thank you for your attention.

Dear investor: Hello, the company has successfully extracted sodium chloride, sodium sulfate, and sodium carbonate from industrial high salt wastewater.

Dear investor: Hello, the company has communicated with the relevant regulatory authorities for the application process.

Dear investor: Hello! The company will disclose the number of shareholders at the corresponding end of the period in its regular reports. For the number of shareholders for undisclosed months, investors are kindly requested to call the company's board office at 010-67986889 and provide relevant shareholder identification documents for inquiry.

Dear investor: Hello, the company has not participated in any business or construction related to the Winter Olympics. Thank you for your attention.

Dear investor: Hello, the company provides solutions, equipment, and operational services related to zero emission salt separation projects in the hydrogen energy production process, focusing on water treatment and water resource reuse. Cooperative enterprises such as Baofeng Energy, Meijin Energy, Huachang Chemical and other leading hydrogen energy companies. Thank you for your attention.