Today it wouldn’t ~ but for back then your typical militaristic Chinese Emperor probably had no idea he might have a chance of conquering Europe ~ he’d seen how the Mongols, who’d overwhelmed his part of the world, had been easily crushed by the far larger and even crazier white men on giant horses!
Speaking of the Mongols, why is it that leftist historians never mention the fact that the Mongols invaded Europe and slaughtered thousands of Europeans leaving areas of eastern Europe practically depopulated? Or that the Turks and other violent, Islamic hordes conquered large parts of Europe? I guess we know the reasons for that.