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SIIC ENVIRONMENT HOLDINGS LTD. 上海實業環境控股有限公司* (Incorporated in the Republic of Singapore with limited liability) (Hong Kong stock code: 807) (Singapore stock code: BHK)

SIIC Environment Signed 40,000 tonnes Project and 250,000 tonnes Projects Commenced Commercial Operations

This announcement is made by SIIC ENVIRONMENT HOLDINGS LTD. (“SIIC Environment” or the “Company”, together with its subsidiaries, the “Group”), a water treatment and environmental protection company listed on the Main Board of the SGX-ST and the Main Board of the Hong Kong Stock Exchange, on a voluntary basis to keep the shareholders and potential investors of the Company informed of the latest business developments.

The Group is pleased to announce that the Company has signed an agreement of 40,000 tonnes project in Province, and seven projects with a total capacity of 250,000 tonnes Wastewater Treatment Plant (“WWTP”) have commenced commercial operations, in the People’s Republic of .

Signed an Agreement of 40,000 tonnes Project in Heilongjiang Province The Company’s indirect 57.9687%-owned subsidiary, the Baoqing Branch Office of the Longjiang Environmental Water Co., Ltd., (雙鴨山龍江環保水務有限責任公司寶清分公司) has signed with the Housing and Urban-Rural Development Bureau of the Baoqing County a supplementary agreement for the upgrade and expansion of the WWTP (“Baoqing Project”). Details are as follows: o The Baoqing project has a designed capacity of 20,000 tonnes per day with the discharge standard upgrading from Class I Standard B to Class I Standard A. o The expansion of the Baoqing Project has a designed capacity of 20,000 tonnes per day with a discharge standard of Class I Standard A.

A Total Capacity of 250,000 tonnes Projects have Commenced Commercial Operations SIIC Environment recently commenced commercial operations on seven WWTP projects with a total capacity of 250,000 tonnes, including two expansion projects and five upgrading projects. Details of the projects are as follows:

1. Wuchuan City WWTP Project has completed upgrading with a designed capacity of 40,000 tonnes per day and discharge standard as Class I Standard A. The project commenced commercial operations retroactively since January 1, 2021. 2. City WWTP Project 1st Phase has completed upgrading with a designed capacity of 25,000 tonnes per day and discharge standard as Class I Standard A. The project commenced commercial operations retroactively since November 5, 2020. 3. Anda City WWTP and RWT Project has completed upgrading with a designed capacity of 45,000 tonnes per day and discharge standard as Class I Standard A. The project commenced commercial operation retroactively since November 5, 2020. 4. City WWT and RWT Project (East Plant 1st) has completed upgrading with a designed capacity of 30,000 tonnes per day and discharge standard as Class I Standard A. The project commenced commercial operation retroactively since December 13, 2020. 5. Hegang City WWT and RWT Project (West Plant 1st) has completed upgrading with a designed capacity of 30,000 tonnes per day and discharge standard as Class I Standard A. The project commenced commercial operation retroactively since November 4, 2020. 6. Hegang City WWTP Project (West Plant Expansion) has a designed capacity of 30,000 tonnes per day and discharge standard as Class I Standard A. The project commenced commercial operation retroactively since November 4, 2020. 7. City Second WWTP Project forward part has a designed capacity of 30,000 tonnes per day and discharge standard as Class I Standard A. The project commenced commercial operation retroactively since December 30, 2020. Since then, the total designed capacity of the project has reached 50,000 tonnes per day which fully in commercial operation.

The projects are expected to contribute positively to the Group’s performance going forward.

For investor relations inquiries, please contact [email protected].

By Order of the Board SIIC ENVIRONMENT HOLDINGS LTD. Mr. Yang Jianwei Executive Director

Hong Kong and Singapore, 20 May 2021

As at the date of this announcement, the non-executive Chairman is Mr. Zhou Jun; the executive Directors are Mr. Yang Jianwei, Mr. Zhu Dazhi, Mr. Xu Xiaobing, Mr. Huang Hanguang and Mr. Zhao Youmin; and the independent non-executive Directors are Mr. Yeo Guat Kwang, Mr. An Hongjun and Mr. Zhong Ming.

* For identification purpose only