You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "when did china become permanent member of un security council?" whose answer is 1945.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did china become permanent member of un security council
Useful Output:

Doc 1: When the UN was founded in 1945, China became one of the five permanent members of the UN Security Council as a victorious country in World War
Doc 2: In October 1971 the People's Republic of China (PRC) replaced the Republic of China (ROC) in the United Nations General Assembly and Security Council.
Doc 3: India's first Prime Minister, Jawaharlal Nehru, was the “original sinner” who favoured China over India for permanent membership in the UN Security Council.
Doc 4: Beijing's diplomats took their seats in the General Assembly on November 15, and as a permanent member of the Security Council a week later.
Doc 5: On 25th October 1971, the United Nations General Assembly passed resolution No. 2758 with a two-thirds majority that admitted the People's Republic of China