Jiao probably won't be invading anytime soon but that doesn't mean she won't talk some belligerent talk and sponsor some shit-stirrers in Corea and Nippon in the meantime. Maybe when things start falling apart under Oswald later on, they'll feel comfortable enough more openly fucking aroundThat would be difficult when Corea and Nippon both thoroughly Christianized and buy into Fascism by this point, well viewing the Chinese as racial inferiors and now heretics, and as targets for expansion. Not to mention, China has been ravaged for decades by civil war and warlordism and Corea and Nippon have both been actively invading it. Corea and Nippon would also both have thorough League of Nations support throughout any such war, almost certainly including American nukes, since Holy Nippon is technically part of America and losing any ally to such an invasion would shatter their myth of invincibility. The winners of the OTL Chinese Civil War (the PRC) couldn't even invade Taiwan, how is she going to invade Nippon?