This is a piece of advice when engaging contractor.

1)whatever request/item u demanded, the C forever no problem, never advice against - CAUTION

2)when u minta discount, very easy the C agree & oblige - CAUTION

3)the way the C speak, very friendly, very soft, apa pun boleh, apa pun ok - CAUTION

Yes, not easy.

U need to have a bit of construction/renovation knowledge.

So when u ask the contractor, like how he's gonna work thru some issues, or what's the workflow.

From the answer, u can tell if he's trying to cut corners or just give empty promise & so on.