Chinese are like locusts it seems...
Chinese government engages in state-sponsored piracy. Basically the government gives an organized crime cartel of thousands of long-range fishing boats, the so-called "blue boat militia," financial sops, safe harbour, and active support from Chinese Coast Guard and PLAN, to violate other countries' EEZs for fishing, surveillance, ELINT, and even literal piracy in some cases.
These boats fish in EEZs of countries as far away as East Africa and Latin America, across the various tiny Pacific island nations that cannot enforce their EEZ rights, and even ocassionally in the waters of large nations like The Philippines, Indonesia, Vietnam, etc.
RAND Corporation published a fascinating paper on this.
China's armed fishing militia plays an instrumental role in Beijing's strategy to enforce its sovereignty claims in the South China Sea and East China Sea. Why did Beijing create a maritime militia to begin with and how has it evolved over time? What does this history suggest about its future?
www.rand.org