A pregnant woman has her belly painted during a belly fashion contest in Haikou, south China's Hainan Province, Aug. 4, 2019. Thirteen pregnant contestants took part in the event here Sunday. (Xinhua/Guo Cheng)

A pregnant woman performs on the stage with her husband and son during a belly fashion contest in Haikou, south China's Hainan Province, Aug. 4, 2019. Thirteen pregnant contestants took part in the event here Sunday. (Xinhua/Guo Cheng)

Pregnant women dance on the stage during a belly fashion contest in Haikou, south China's Hainan Province, Aug. 4, 2019. Thirteen pregnant contestants took part in the event here Sunday. (Xinhua/Guo Cheng)

A pregnant woman performs on the stage during a belly fashion contest in Haikou, south China's Hainan Province, Aug. 4, 2019. Thirteen pregnant contestants took part in the event here Sunday. (Xinhua/Guo Cheng)

A pregnant woman has her belly painted during a belly fashion contest in Haikou, south China's Hainan Province, Aug. 4, 2019. Thirteen pregnant contestants took part in the event here Sunday. (Xinhua/Guo Cheng)

A mock-up of teahouse cabin by Xi'an University of Architecture and Technology and Politecnio di Milano Photo: Courtesy of Xi'an University of Architecture and Technology and Politecnio di Milano