Mr. Vorachai Phakdeesanaeha Mr. Worachai Pakdeesaneha, managing director who is responsible for the operation of Vorakit Construction Company Limited ("VKK") shall be liable for VKK's

Mr. Kritchthorn Chindapradist Mr. Kritchthorn Chindapradist, managing director who is responsible for the operation of SAMART TRAFFIC COMPANY LIMITED (“SMT”) shall be liable for SMT's offering

Mr. Anuwat Burapachaisri Mr. Anuwat Burapachaisri, the managing director, who is responsible for the operation of MEC Far East International Public Company Limited (“MEC”), shall be liable for MEC

Confidential information CRAs should maintain in confidence all non-public information communicated to them by any issuer, or its agents, under the terms of a confidentiality agreement or otherwise under a

the SEC Office for updating the information at all times. 3 . We acknowledge and agree that we have the duty to oversee and keep confidential the Username and the Password of Company Account which we

duty to oversee and keep confidential the Username and the Password of the SEC Account which we have received from the SEC Office without disclosing and allowing them to be used by any unauthorized

We acknowledge and agree that we have the duty to oversee and keep confidential the Username and the Password of the SEC Account which we have received from the SEC Office without disclosing and

ACC1/19-007 February 18, 2019 Subject: Management Discussion and Analysis for the year ended December 31, 2018 To: Director and Managing Director The Stock Exchange of Thailand Qualitech Public

ACC1/20-012 February 25, 2020 Subject: Management Discussion and Analysis for the year ended December 31, 2019 To: Director and Managing Director The Stock Exchange of Thailand Qualitech Public

AC 52/07-003 ACC1/19-019 May 13, 2019 Subject: Management Discussion and Analysis Quarter 1 Ending March 31, 2019 To: Director and Managing Director The Stock Exchange of Thailand Qualitech Public