One huge factor in clutch life is how it was set up when first put into service. From the Chinese factory, there is little likelihood that it is properly adjusted and it must be set up by the assembler at point of sale, or by the owner when he first gets it. Failure to do so will mean a short clutch life, just as "riding" the clutch will.
These two-stage clutches take a bit of care to set up, but if done correctly and driven correctly (either all-in or all-out, but no slipping it), one should last 800-1000 hours according to reports I read from users. That all-in or all-out rule applies to pretty much any tractor, by the way. Tractor clutches, unlike car clutches, aren't intended to provide a means of varying one's speed - that's what gears and throttle (to some extent) are for. Just jam it in and drop it out and deal with the lurch. Your clutch will love you, even if your neck doesn't. (grin)
When you change the filter, be sure to fill it with fuel before you put it on, and be prepared to have to prime the lift pump anyway. Just a fact of life with diesels.