The tanks of the Tang Army always have a red Dragon Banner on the roof as a friend-or-foe identification mark, a tradition that actually serves little practical purpose now.
Most of Tang Country's ground support aircraft can't really see a target as large as the tank roof, at most they catch a fleeting glimpse of a red blur.
More often, pilots rely on their experience to judge the location of friendly or enemy targets, which is actually highly subjective.
Even during the Gulf War period, the issue of friendly fire was never completely resolved. The Lighthouse Country came up with various methods to prevent it, but they were mostly futile.
Later, with more advanced technology, friendly fire began to be truly controlled. This control was more evident in battles with a significant power imbalance.
