Foreign military aircraft and warships have not yet reached an agreement on whether to allow them to enter the territorial waters of other countries.

Not allowed. It is mainly determined by international laws and domestic laws such as the United Nations Convention on the Law of the Sea. But the characteristics of international law are: first, it only takes effect for signatory countries; Secondly, even member countries can make an exclusion statement when they join, clearly indicating which specific provisions of this convention are excluded. China's declaration at the time of accession includes "the provisions of the United Nations Convention on the Law of the Sea on the innocent passage of territorial waters, which does not prevent coastal countries from requiring foreign warships to obtain permission in advance or notify their own countries according to their own laws and regulations." Therefore, foreign countries must obtain China's permission to exercise freedom of navigation in China's territorial waters.

The territorial sea is a part of the national territory. Once foreign ships enter the territorial waters of other countries, they must abide by the relevant laws and regulations of coastal countries. On this premise, we have the right of "innocent passage". The so-called "right of innocent passage" refers to the right to pass through the territorial waters of coastal countries without damaging the peace, security and good order of coastal countries. The United Nations Convention on the Law of the Sea stipulates that any of the following acts or activities will be regarded as damaging the peace, security and good order of coastal countries:

(1) Any threat or use of force against the sovereignty, territorial integrity or political independence of the coastal state;

(2) Use any kind of weapons for any training or exercise;

(3) Any act aimed at collecting information and undermining the national defense or security of coastal countries;

(4) any propaganda act aimed at affecting the national defense or security of coastal countries;

(5) Landing or picking up an aircraft;

(6) Launching, landing or picking up any military device on board;

(seven) in violation of customs, finance, immigration or health regulations of coastal countries, any goods, currency or personnel;

(8) Any intentional and serious pollution in violation of the provisions of this Convention;

(9) any fishing activities;

(10) Conduct research or measurement activities;

(1 1) Any act aimed at interfering with the communication system or other facilities or equipment of the coastal state;

(12) Any other activities not directly related to adoption.