I take Finish Line but the question is really, how much?
Can you get advanced bike lube in Chinese small town bike shops?
Istambul has some bike shops where you can re-stock and I imagine in Cappadocia (MTB hotspot in central Turkey) there are decent bike shops.

To reduce wear, you really need to replace your chain before it gets to a critical amount of "stretch" and starts to wear down your cogs. What is the availability of 9 speed chains in small town China?