日中関係

領事関係に関するウィーン条約でしょう。

http://www.un.org/law/ilc/texts/consul.htm

Article 31

INVIOLABILITY OF THE CONSULAR PREMISES


1. Consular premises shall be inviolable to the extent provided in this

Article.


2. The authorities of the receiving State shall not enter that part of the

consular premises which is used exclusively for the purpose of the work of

the consular post except with the consent of the head of the consular post

or of his designee or of the head of the diplomatic mission of the sending

State. The consent of the head of the consular post may, however, be

assumed in case of fire or other disaster requiring prompt protective

action.


3. Subject to the provisions of paragraph 2 of this Article, the receiving

State is under a special duty to take all appropriate steps to protect the

consular premises against any intrusion or damage and to prevent any

disturbance of the peace of the consular post or impairment of its dignity.


4. The consular premises, their furnishings, the property of the consular

post and its means of transport shall be immune from any form of

requisition for purposes of national defence or public utility. If

expropriation is necessary for such purposes, all possible steps shall be

taken to avoid impeding the performance of consular functions, and prompt,

adequate and effective compensation shall be paid to the sending State.