She initially trained as a cargo pilot and has been praised for her cool handling of an incident when her jet hit a flock of pigeons but she was still able to land the heavily damaged aircraft.
She and her two male colleagues - mission commander Jing Haipeng, 45, and Liu Wang, 43 - will take off at 6.37 pm (1037 GMT) from the Jiuquan space base in north China's Gobi desert.
HOWSTUFFWORKS: 10 Signs China Is Serious About Space They will perform China's first manned space docking - a highly technical procedure that brings together two vessels in high speed orbit.
At a press conference the astronauts - who appeared behind a glass wall before a small group of hand-picked journalists - said the manual docking was a "huge test", but that they had rehearsed the procedure more than 1,500 times.
"The three of us understand each other tacitly. One glance, one facial expression, one movement, we understand each other thoroughly," said Jing.
The mission to dock with the Tiangong-1 module currently orbiting Earth is the latest step in a plan aimed at giving the country a permanent space station in which a crew can live independently for several months by 2020.