Xu Rongmao GBM, GBS (simplified Chinese: 许荣茂; traditional Chinese: 許榮茂; born 1950), or Hui Wing Mau in Cantonese, is a Chinese-Australian entrepreneur and billionaire, and the founder and the chairman of Shimao Property. Xu is estimated to be one of the largest property developers in Shanghai. According to Forbes in 2021, his net worth is estimated at $10.3bn.