No doubt price. Unfotunatly Chinese products are not known for quality although there are a few companies that are trying.
Its really about value for money. We distribute good chinese products but I would not consider putting them into a heavy duty hire contract operating 24/7. They are however quite suitable for a lighter use 3/4 hours a shift and even for 2 shifts.
Its very important that the supplier knows the application, knows everything about the trucks and carries the spares needed to support them. The distributor needs to visit the Chinese manufacturer 2/3 times per year to be certain that the quality is being maintained or improved and that the manufacturer understands about all the problems caused by poor quality. Its important that every truck is tested before despatch to ensure that the dealer has nothing to do when carrying out the pre-delivery inspection
I hope this helps.