monopolizer

1. Meanwhile, as the monopolizer in China's banking trade, the reform process of the four state-owned banks is closely connected to that of China's economic restructuring.
   同时，作为中国银行业的垄断者，四大国有银行的改革进程又是与中国经济体制改革进程息息相关的。

noun

1. someone who monopolizes the means of producing or selling something

   Synonym:    monopolistmonopoliser