Beijing's free Wi-Fi service was extended on Monday to cover several bus routes, but some people complained that the service is unreliable and slow.

Some buses, including buses No 99 and No 52, which run around Chang'an Avenue in the capital, recently added free Wi-Fi.

"It's very good news to me because I can kill the time during traffic jams without worrying about the network flow," said Chen Si, a 34-year-old city resident. Chen said he even downloaded a game on Bus 52 on Monday. "This is a very considerate service," he said.