I watched the Original Drishyam (Malayalam) and all the Remakes of Drishyam.
Sheep Without A Shepherd (Chinese remake) is the best one among all of them.
(I'm not saying original is bad, it is a CLASSIC but the Chinese remake took it to the next level)
Reasons:
1. No unnecessary scenes in the beginning just to show how he is with his family and the people around him.
2. Has better actors than Malayalam version (EXCEPT Mohanlal - He is the best) or any other version.
3. Excellent cinematography