Zen Corporation Group Public Company Limited 782/1 Soi Onnuch 17, Suanluang, Bangkok 10250 THAILAND Tel: 02-0195000 18 February 2019 No. ZEN 2562-006 Subject Management Discussion and Analysis for

Directors’ Meeting of Vinythai Public Company Limited (“Vinythai”) No. 5/2018, held on 29 November 2018, at 13.30 hours, at Ratchaphruek Room, Vinythai Public Company Limited, 18th Floor, Q.House Sathorn

U City Public Company Limited (Registration No. 0107537000459) 21 TST Tower Soi Choei Phuang, Viphavadi-Rangsit Road, Chomphon, Chatuchak, Bangkok 10900, Thailand T: +66.2273.8838 F: +66.2273.8858

Public Company Limited (“the Company”) would like to report on Management Discussion and Analysis from the Separate and Consolidated Financial Statements of the year ended December 31, 2017. The details

Page 1 of 3 T.K.S. TECHNOLOGIES Business Overview T.K.S. Technologies Public Company Limited (“company”) reported total revenues from sales of THB 312 mil. for the 1st quarter 2018, which dropped of

Company Limited was 2,897.0 million Baht, increase 571.8 million Baht. An increasing in share premium, Advance receipt of share subscription and retain earnings increase due to the Company‘s net earnings

of Assets and Connected Transaction The Board of Directors of Cal-Comp Electronics (Thailand) Public Company Limited (the “Company”) No.2/2017 was held on May 12, 2017 at 10:00 hours. The Company would

Public Company Limited (“the Company”) would like to report on Management Discussion and Analysis from the Separate and Consolidated Financial Statements of the year ended December 31, 2018. The details

Company Limited (“the Company”) would like to submit the management’s discussion and analysis of our operating results for the year 2018 period ended December 31, 2018, as follows: (Unit: Baht million

/2561 November 12, 2018 Subject: Management’s discussion and analysis of the Company’s operating results for Q3/2018 period To: President The Stock Exchange of Thailand DOD Biotech Public Company Limited