The bus plunged 50 metres off the bridge into the Yangtze, China's longest river, in Chongqing city on Sunday.
Deadly road accidents are common in China, where traffic regulations are often flouted or go unenforced.
Rescuers lifted the wreck of the bus from the river Wednesday night.
Police say a brawl between a passenger and a bus driver was the cause of the bus plunging off a bridge in southwestern China. However, Liu did not get off and later asked the driver to stop the bus when she realised she missed her destination.
Thirteen bodies were reported to have been found.
She first struck him with her hands before launching her cell phone at his head, at which he point he lost control of the vehicle and swerved hard to the left before swinging back in the other direction.
Dashcam footage from another vehicle shows the bus swerving, colliding with a auto and crashing through a barrier before plunging off the bridge.
Fifteen people had been on the bus, including the driver.
The driver then took his right arm off the steering wheel as he tried to defend himself.
More than 70 rescue boats came to the scene, including three floating cranes with a total capacity of 125 tonnes.
Four passengers, who got off earlier, confirmed that a medium-height woman had quarrelled with the driver because she missed her stop, local police said.
A Wanzhou police statement said the driver and the passenger broke the law with their actions because they seriously endangered public safety.
The passenger and driver have been identified by their surname as 48-year-old Liu and 42-year-old Ran, both from Wanzhou, police added.