2020 To : The President The Stock Exchange of Thailand Bangkok Chain Hospital Public Company Limited (the “Company”) would like to report the operating results for the first quarter ended 31 March 2020

ทดสอบกระดาษหัวจดหมาย IRC 5 -Translation- August 11th, 2017 Subject: Notification of Undertaking the Connected Transaction To: Managing Director The Stock Exchange of Thailand Refer to the Board of

T.K.S. TECHNOLOGIES 1 March 2021 Re: Management Discussion and Analysis for the period ended 31 December 2020 To: President The Stock Exchange of Thailand T.K.S. Technologies Public Company Limited

According to referrals from the Stock Exchange of Thailand (SET) and the SEC’s further investigation, there were facts and evidence leading to believe that the actions of the three persons above

above, PVD could be another safety net for the labor force besides social security.?Currently, the average contribution of employers and employees nationwide is 5 percent each, as opposed to the maximum

Subsidiary Attn.: President The Stock Exchange of Thailand Enclosure: Information Memorandum on Connected Transaction of JKN Global Media Public Company Limited and Subsidiary The Board of Directors’ Meeting

-Translation- Ref. IR 62/005 March 13, 2019 Subject: transaction yDisclosure of the information regarding related part To : President, The Stock Exchange of Thailand T.K.S. Technologies Public

-Translation- Ref. IR 62/005 March 13, 2019 Subject: Disclosure of the information regarding related party transaction (Additional Information) To : President, The Stock Exchange of Thailand T.K.S

1/4 -Translation- No. KC 019/2562 4 September 2019 Subject: Notification on the resolution of the Board of Director Meeting Re: The land disposal of K.C. Park Ville (Zone B) To: President The Stock

efficient, transparent, and examinable, in a bid to promote confidence towards, and integrity and security of, the overall financial system, and to improve the competitiveness and image of the Thai capital