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: "Q:Are both Ankang and Langzhong administered as part of the prefecture-level city of Nanchong?  A: No?" whose answer is no.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Langzhong in Nanchong
Useful Output:

Doc 1: Langzhong Ancient City in Sichuan province's Nanchong, a city regarded as a strategic southwestern stronghold by the emperors of several Chinese
Doc 2: Langzhong Ancient City in Sichuan province's Nanchong is regarded as a strategic southwestern stronghold by the emperors of several Chinese
Doc 3: Aerial photo shows the Langzhong ancient city in Nanchong, southwest China's Sichuan Province, April 3, 2021. (Photo by Wang Yugui/Xinhua)
Doc 4: Aerial photo shows tourists viewing the Langzhong ancient city on boats in Nanchong, southwest China's Sichuan Province, April 3, 2021.
Doc 5: A historical gem with a rich cultural heritage, is the perfect place to ring in the New Year. Its well-preserved ancient architecture and traditional atmosphere