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: "Which city is more populous, Liaoyang or Changchun?" whose answer is Changchun.
Each document should contain about 30 words, and these documents should contain useful information.

Query: population of Changchun
Useful Output:

Doc 1: In 2010, the population of Changchun had amounted to about 3.58 million inhabitants and was forecasted to grow up to almost 5.5 million by 2035.
Doc 2: With an estimated population of 9.07M, Changchun is the 31st largest city in China. ✈️ Closest airport, 1 km, Changchun Air Base. Air
Doc 3: Changchun's 2025 population is now estimated at 4,891,020. In 1950, the population of Changchun was 764,544. Changchun has grown by 88,570 in the last year,
Doc 4: The population of Changchun, China is 6 830 045 for 2025. Changchun ranks 29 in terms of population in China from 137 cities. Chislennost.com uses information
Doc 5: The 6 urban districts of Changchun's city proper have a total population of 3,341,700 in 2010 which correspond to the built up area. Changchun started as a