In 2016, the scale of China's mobile payment transactions was equivalent to US$ 9 trillion U.S. dollars, making it 90 times of that of the United States in the same year and 147 times of Europe's. There are many possible reasons for the rise of mobile payment in China, but one of the important reasons according to Anbound scholar Chan Kung is because of the different legal systems. The United States has a very sound legal system; Americans are afraid of legal sanctions and any carelessness will cause grave consequences. On the contrary, China is a huge extrajudicial "hot spot".