Visitors wait in line to board the Robobus, a self-driving sightseeing vehicle, at Lianhua Hill Park in Futian District yesterday. Parkgoers can experience the Robobus without an appointment through Dec. 31, according to the park. The unmanned vehicle traverses a 450-meter route in eight minutes. The Robobus can accommodate up to six passengers and is an L4-level autonomous vehicle, meaning it operates without a human driver as backup.

P8>Liu Xudong