In late 1936, Mussolini's Italy recognised Japan's occupation of Manchuria.
What if Chiang Kai-shek decided to try to show that both his Nationalists and China were not pushovers (since it was perceived by the other powers as weak) and occupied the Italian concession in Tianjin in retaliation?
Being opportunistic, it is unlikely that Italy could do much to defend its concession, while Chiang could score a cheap political victory that might boost him domestically and possibly internationally.
What would be the consequences of such an action, both domestically in China and Italy, and in international relations?