Formal wear with a big back Xu Kai is as handsome as a snap Formal wear with a big back Xu Kai is as handsome as a snap Formal wear with a big back Xu Kai is as handsome as a snap Formal wear with a big back Xu Kai is as handsome as a snap Formal wear with a big back Xu Kai is as handsome as a snap Formal wear with a big back Xu Kai is as handsome as a snap