Regarding your question, this kind of engine noise may lead to the following situations: 1. The oil pump is worn, resulting in low oil pressure when the engine is idling; 2. The dirty oil passage leads to the decrease of oil pressure and the increase of engine load after gear shifting, which leads to valve ringing; 3. The camshaft and valve ejector pin are worn, which causes the valve to ring when the engine is at low speed. 4. Nozzle or carbon canister solenoid valve makes sound when working. According to the above situation, it is recommended that you go to the 4s shop or repair shop for on-site inspection, so as to accurately determine the specific cause of the failure.