Dear Khun Chitavorn,
As discussed, please:
1) In the BQ, mark clearly the scope of work especially M&E demolitions not only on ceiling but include on wall and floor
2) In generally electrical work shall be demolished up to contract panel unless otherwise stated
3) MVAC air duct within the room shall be demolished all as far as possible
4) Plumbing and drainage pipes shall be up to stop valves
5) All M&E pipes shall be capped, taped, covered or protected to ensure safety and tidiness
6) Basically finishes shall be demolished up to concrete or block wall surface (please check).
7) All materials belong to contractor and shall be removed away from TNC area (please discuss if it is not the case)
8) For the drawings, correct and mark clearly the scope