If you want to create a Chinese (or any other Eastern, including Eastern European) coal train but find the current selections to be a bit cost prohibitive, then do what the Hobby Sensei does and use cars that closely simulate the the ubiquitous C64 and C70 gondolas of China. These look really great and no one will know the difference!
Please note that these gondolas use flip-latch style couplers that will not couple with knuckle couplers, including Kaydee. Also, these couplers are pocketed couplers and you cannot simply switch the out with a hole-shank coupler like you normally would (e.g. changing a horn-hook coupler out with a Kaydee). However, you only need to change one (1) coupler (the first one) in order to make it a train. If you're going to use these gondolas in the middle of a train then you just need to swap out two of the couplers (first and last). You can purchase these couplers for $.50 each in the options dropdown.
Please note that if you order quantities off these, there's a possibility that the Hobby Sensei website will overcharge you shipping. Don't worry! The Sensei will change the charged difference before capturing the credit card payment! The Sensei HATES overpaying for shipping and makes sure that you won't, either!