A photo of Chinese tourists wearing T-shirts depicting Beijing’s claims to the disputed South China Sea has sparked online anger in Vietnam, prompting calls for the visitors to be deported. The shirts featured a map of China and its so-called nine-dash line – the sea boundary found on some 1940s-era maps which Beijing says proves its claim to most of the waterway, despite partial claims from Vietnam and other nations. Meanwhile, US clothing retailer Gap Inc has apologised for selling a T-shirt which it said had an incorrect map of China. The apology came after a person posted pictures of the T-shirt on Chinese social media network Weibo, saying that Chinese territories, including south Tibet, the island of Taiwan and the South China Sea, were omitted from the map.