Northern China was OK, but south-east coast and the Jiang's south-west base was horrible for tanks. It's like an endless Venice city without roads back-stopped by the Himalayas. That was the reason the Japanese could not erradicate Jiang, they could take even the fragmented plains but Sichuan is one of the most unforgiving places on earth.

The Chinese Nationalist Army had no military tradition. Its experience with modern warfare consisted of having its butt kicked by the Japanese. The only good troops they had were trained by Hitler's Wehrmacht in the late twenties and all of them died defending Shanghai; Jiang's army was a patchwork of warlords with basically feudal command relationships, unpaid troops who were gang-pressed into the military, and pretty bad drug abuse problems, too.

The soldiers seem to have turned out fine infantrymen. But their officers were just no good.