With "heavy armoured", you mean that the IJA has plenty of heavy tanks and other effective armoured vehicles at its disposal? No, it can't be. All in all, the Japanese tanks were mediocre at best, but the NRA suffers from a chronic shortage of armoured vehicles and anti-tank weapons itself, so even obsolete tanks soldiered on in China in the IJA until the very end of WWII. Lend-Lease American tanks in NRA service did show remarkable success in Burma however, as well as the efforts of the 200th Division, the first mechanised division of the NRA which received Soviet tanks, small arms and ordnance.
Generally speaking, most of the Nationalist divisions were understrength (for standards in 20th century warfare), lacked artillery and received little to no training with the notable exception of the German-trained divisions as you've already pointed out and the Muslim ones which were trained without Western aid and was devoid of modern weaponry, but impressed European observers with awe.
As far as the Air Force was concerned the ROCAF received substantial Soviet, and later American support with overall indifferent results even though some success could be attained.
) during my childhood, settled in Germany while I was still young and I occasionally visit my relatives in my hometown. Where I settle in and for how long doesn't matter, I'm a PRC sympathiser (and proudly so) 
You won't call me traitor, eh? 
partay:------ Why i call you traitor. but i think a correct attitude is beneficial.
