The noise of Tiggo 3 engine is getting louder and louder. What is the reason?

Reason; 1; It started with a lot of noise and then disappeared. If the temperature is low, the engine oil can't reach the top dead center of the engine immediately, and the engine is in a dry grinding state, which makes a lot of noise at the moment of starting. 2; Idle noise is large, and the noise decreases or disappears after acceleration or engine temperature increases. The oil pressure is insufficient and the oil pump is not working properly. It is necessary to check the oil pressure. It is possible that the oil pump is faulty or the oil is too thick. 3; Idle noise is loud, and it is even louder after acceleration. If this is the case, your engine may be badly worn and need maintenance.