https://en.wikipedia.org/wiki/Dudou
A dudou (Chinese: 肚兜, 兜肚, or 兜兜; also known by other names) is a traditional Chinese article of clothing that covers the front of the torso, originally worn as an undershirt with medicinal properties. With the opening of China, it is sometimes encountered in Western and modern Chinese fashion as a sleeveless shirt and backless halter-top blouse.
Description
A dudou (Chinese: 肚兜, 兜肚, or 兜兜; also known by other names) is a traditional Chinese article of clothing that covers the front of the torso, originally worn as an undershirt with medicinal properties. With the opening of China, it is sometimes encountered in Western and modern Chinese fashion as a sleeveless shirt and backless halter-top blouse.