evidence: This view of China’s maritime territory would change dramatically over the following three years. It seems likely that this change was facilitated, perhaps even orchestrated, by two of Bai Meichu’s students. In 1927, while he was chair of the Department of History and Geography at Beijing Normal University, Bai taught Fu Jiaojin 傅角今 and Zheng Ziyue 鄭資約. After the Second World War, they were hired by the Chinese Ministry of Interior to advise the government on its territorial boundaries. They drew the government maps in 1946 and 1947 that led to the official Chinese claim in the South China Sea. Fu and Zhang used Bai’s map and his ‘U-shaped line’ to guide them. Thus China would claim the underwater features of the James Shoal and Vanguard Bank as its territory. This makes no sense at all – except if you understand this strange piece of history. The Chinese claim is the result of a series of mistakes. [...] It was not until 1948, therefore, that the Chinese state formally extended its territorial claim in the South China Sea to the Spratly Islands, as far south as James Shoal. Clearly something had changed in the years between July 1933, when the Republic of China government was unaware that the Spratly Islands existed, and April 1947, when it could "reaffirm" that the southernmost point of its territory was James Shoal.