We Met as Strangers, and Recognized Each Other Too Late

The most doted-on little princess in the entire Huoyun Dynasty, Chi Xin, insists on guarding the border. In truth, with her father far away, she can do whatever she wants. There she meets Qing Gan, the neighboring kingdom's crown prince, who has entered the border in disguise. One is a woman disguised as a male cook in the army, the other a border vegetable seller. In the end, both disappear, only to turn up in the capital of Huoyun.