Cultural shirt = t-shirt (transliteration "T-shirt"), is a special kind of T-shirt! Generally refers to short-sleeved round-neck shirts designed with some words or patterns with specific meanings on the clothing.
It is the most "cultural" kind of clothing, covering politics, ethnicity, music and movies, pet cartoons, trend information... everything. Its greatest value is not in the style and fabric, but in the cultural content it carries.
For example, every festival held in China will produce corresponding cultural shirts. For example, during the 2008 Olympic Games, cultural shirts with logos appeared and were given away and sold as souvenirs