This is the power unit just removed from Chen Xiangbei's car No. 13!
During the post-race inspection, the team engineer discovered oil stains on the engine and found through the ECU (vehicle computer) that sensors had issued a hydraulic leak warning.
However, during the race, the whole power unit was in a high-temperature alert state, and the low-priority hydraulic leak warning did not catch the engineers' attention.
It's like how modern civilian cars slightly leak oil, which is not much of a problem.
But the large oil stains found during the post-race inspection indicate that it's far more serious than just a minor oil leak.
Moreover, Chen Xiangbei's engine is a newly opened power unit, which theoretically should not have faced such issues.
