So where are you planning to get the steel from? Where will you get the alloys from? Where are you planning to get the fuel from? There are lots of factors. Yes China has a huge industrial base. I am not denying it but the raw materials also matters. And most of China cannot fight a major Tank battle except for the Sikkim sector. You need to look at the terrain. And driving tanks through mountains and forests is the worst idea I have ever known. Just look at the technology that goes into a modern tank. Those werent even present in those days. bringing all of them together and assembling it is not a easy task. And major tank battles will be fought with Pakistan and not with China unless you plan to drive it through the Himalayas.
1.fuel. China has global most advanced coal-to-oil plants in inner mongolia.
coal-to-oil tech is not popular jsut due to cost factors.
during war,cost won't be primary factors any more.
in fact, Nazi German used the tech during WW II.
2.70% of CHinese power plants used coals,instead oil. in fact, CHinese can produce 90% of energy it needs,because CHina is the biggest coal-producer and 5 biggest oil producer in the world.
3. steel. CHina has global 4th more iron ores .but most CHinese iron ore are
low grade ores and raise the cost of steel ,so Chinese steel plants would rather import iron ores from Austrialia,Brazil and India during peaceful time.
duirng wars, cost factors will be put aside.
Before attacking pearl harbor, Japanese admiral
Isoroku Yamamoto was firmly oppose to Japan's launching any war against USA,because as a Japanese former navy attach in USA ,he know exactly how powerful USA industry capacity was at that time .
He once said
:" whoever has visited auto plants in Detroit and oil fields in Texas
will never want to war against USA any more!"