I think we are getting too political over MREs here! As Terran said, countries will follow whatever the demands of their soldiers are. If there is a demand for more chocolate in PLA, it would happen. 50 years ago, US MRE was very “WASP”, now they try to accommodate Asian tastes, Latino tastes, etc.
I had posted my own experience before, but I will add a little more flavour to it. Some of the other Chinese guys in my reserve outfit loved to bring their own condiments to add to the meals, sriracha, chili oil, and even XO sauce. So even if it is “white”, you can put your own spin on it.
Honestly meal packs are gross IMO. Near my last years in, they reduced the use of meal packs to save money, as it was cheaper to get fresh food from the base kitchen and bring it out to the field. One time during an area brigade exercise, they set up a field kitchen (very rare). The cook was an Asian guy (Filipino or Chinese probably, I didn’t see his name) with a big restaurant size wok frying up rice for the whole brigade. It was definitely a nice departure from both IMP and base food (I.e cafeteria food).