According to the Peoples Daily the orbital adjustment during the craft's 30th orbit at 21h56 GMT (5.56am Beijing time), was carried out by firing the craft's rockets, altered the spacecraft's altitude by 800 metres; and was a complete success.
The Shenzhou VI capsule is travelling at 7.8km per second (28 080kph), and orbits about 343km above the Earth, making one circle of the planet about every 90 minutes.
According to state TV, the two taikonauts spent the night sleeping in shifts.
Experiments involving slamming the door hatches open and shut, which astronauts Fei Junlong and Nie Haisheng carried out yesterday to test the stability of the craft were successful.
"The results proved that the spacecraft was fully capable of enduring all the disturbances, and then astronauts would be allowed to move in a relatively free way" - Zheng Songhui, spacecraft systems consultant.
The Shenzhou VI spacecraft is scheduled to have its first orbit maintenance operation in the early hours of Friday in order to restore the vessel to its original trajectory. The spacecraft has slightly deviated from its designed orbital height.
Shenzhou VI, on the second day of China's second manned space flight, is travelling at the speed of about 7.82 km per second in a circular orbit 343 km above the Earth. The maintenance is a normal technical operation and similar orbit height boosts are possible in the future. Shenzhou VI was expected to travel in space for up to five days, it has already exceeding the time spent in space during China's first manned flight in 2003, when astronaut Yang Liwei aboard Shenzhou V spacecraft stayed in space for nearly 21.5 hours. It is possible that the spacecraft may land a day early.
"One of our major tasks is to find the rocket's magnetic recorder" - Zhu Yabin, head of a land emergency rescue team.
The "black box”, which was jettisoned from the Long March II F rocket has been found by Lian Hua, an herdswoman in Otog Qi in Inner Mongolia Autonomous Region, 45 minutes after the lift-off. The recorder fell onto pasture land just 1.5 kilometres away from her home. The magnetic recorder was designed to fall onto Otog Qi in Inner Mongolia with other booster parts of the rocket when the rocket performed stage one and stage two separation.
The boosters and fairing attached to the rocket at lift-off also were jettisoned onto four sites in a strip ranging about 800 km that covers Badain Jaran Desert of Inner Mongolia in north China and Yulin of the Shaanxi Province in northwest China. The distinctive red coloured "black box' carried instructions to "Hand over to the Government," and "Monetary Reward Guaranteed."
The magnetic recorder, housed in the first stage of the launcher, was a contingency measure that records data should the telemetry not broadcast. The recorder will be sent to Beijing for data analysis. The other parts of the rocket will be destroyed on site or be sent back to Jiuquan Satellite Launch Centre to be broken up. All, apart from one, of the four roll boosters have been found. The remaining one is still being searched for.
The Shenzhou 6 manned spacecraft is in its second day in space. By noon on Thursday Shenzhou VI had circled Earth 18 times, with one orbit taking about 90 minutes. It's estimated the spacecraft will orbit the earth about 80 times. Shenzhou 6 is being tracked and directed from 10 land-monitoring centres and 4 monitoring vessels, deployed in the Atlantic, Pacific and Indian oceans.
Earlier today the two taikonauts talked to their families. Today happens to be Nie Haishengs 41st birthday. His daughter sang Happy Birthday to him late on Wednesday.
Astronauts Nie Haisheng (left) and Fei Junlong, orbiting the Earth in the Shenzhou VI spacecraft, talk through phones with their family members October 12, 2005. Credit Peoples daily
The craft is designed for the astronauts to stay in space for up to a week. The re-entry module is expected to separate from the orbital module, before returning to earth. Touchdown's expected to occur in Siziwangqi, the middle of Inner Mongolia. The recovery crew at the location is preparing for the craft's arrival. And a standby landing spot at Jiuquan is also ready for use, in the event of an emergency. The orbital capsule will remain in space, and can serve as a target craft for future dockings.
Chinese taikonauts Fei Julong and Nie Haisheng today conducted observation and science experiments in their orbital module orbiting 343-kilometer high. The science tests were to evaluate the effects of weightlessness.
Chinese Premier Wen Jiabao (R) hugs Wang Yongzhi, chief designer of China's manned space flight program, after the successful launch of spacecraft Shenzhou-6 at the Jiuquan Satellite Launch Center in northwest China's Gansu Province, Oct. 12, 2005. Credit Xinhua
The Shenzhou-6 spacecraft entered into orbit at 1:21 GMT. During the 5 day mission the astronauts will leave the re-entry capsule and enter into the larger (9 cubic metre) orbital module at the front of the spacecraft.
It is not clear as to what the astronauts will do for those 5 days.
This TV image shows the Long March II F carrier rocket launching from the Jiuquan Satellite Launch Centre in northwest China's Gansu Province at 09:00 (local time) Oct 12, 2005.