Not 自相矛盾. The Japs's arsenal was way more powerful

than the Chinese during WW2. Their weaponry, however, were nothing but pieces of crap when facing the other major war powers. For example, the Jap most powerful tank, type 3 Chi-Nu, weighted only 18 tons. They had trouble to go against the American Sherman, let alone the Russian IS-2/1 series or German Tiger series.