The sun always rises. Twenty-four hours into their space adventure, the three Chinese taikonauts on board the Shenzhou-7 spaceship have witnessed sunrise and sunset for 16 times in their 680,000-kilometer journey.

Despite a challenging mission slated today -- the nation's first attempt on a space walk, the trio, Zhai Zhigang, Liu Boming and Jing Haipeng, kept "quite relaxed and spirited" since they were sent into orbit at 9:10 pm Thursday, officials with the Beijing Aerospace Control Center (BACC) said.

Since Shenzhou-7 blasted off from the Jiuquan Satellite Launch Center in northwest Gansu Province, the three men, all aged 42, have had three meals over the past 24 hours.

Compared with their predecessors in the previous two missions of the country's manned space program, the Shenzhou-7 taikonauts are quite spoiled with a spicy 80-dish menu.

Their nutritionists have disclosed that their choices range from Kung Pao Chicken, deshelled shrimp to frozen dry fruits. For vinegar-loving Jing, the seasoning is well at hand, as various seasoning and sauces are provided on board. Jing is from northern Shanxi Province, where vinegar is a favorite condiment for locals.

Compared with Jing, Nie Haisheng, an astronaut on the Shenzhou-6 mission in 2005, was not that lucky. "I missed very much my favorite spicy foods and garlic sauce during my flight," Nie recalled.

What's more, the Shenzhou-7 taikonauts will not need to worry for half-cooked rice as Nie ate in his mission. The food heater onboard Shenzhou-7 has a stronger electricity supply than that on Shenzhou-6 as it is connected to the main power supply, which will make sure their rice can be fully cooked.

Monitoring video at the BACC showed that Jing Haipeng was sleeping in the re-entry module at noon yesterday. With two hands in front of the chest, Jing slept quietly.

Staff at the BACC told Xinhua that Jing was actually taking a nap. The right place to sleep was the orbital module, where sleeping bags were placed.

The sleeping bags, made of warm fabrics and cashmere, are hooked on the wall of the orbit module. Astronauts only need to get into the sleeping bag and fasten the zipper if they want to sleep.

Under the low-gravity condition, astronauts may sleep standing, sitting or lying. When they sleep, they have to put their arms inside the sleeping bag and tie their hands on their chests, so as not to touch equipment switches accidentally.

Having been trained for a decade for the manned space mission, the men were eager to enjoy the feeling of a "real" loss of gravity, as Liu Boming said when meeting reporters before they started the space journey.

Liu flipped a pencil and smiled while watching it floating as soon as Shenzhou-7 entered the orbit, while Zhai let go his work manual and watched with keen interest.

They also took every chance to take as many pictures as possible.

At 1:30 pm yesterday, Jing moved to the left side of the module and started taking pictures of the earth. He stopped for a while to check the photos, but then, apparently not very satisfied, started to press the camera button again.

Of course, working is the most important part.

Yesterday morning, Shenzhou-7 entered a stable circular orbit where the taikonauts assembled the US$4.4-million homemade Feitian space suit for extra-vehicular activity (EVA) and started training for the country's maiden spacewalk.

Zhai and Liu spent more than 11 hours unpacking and assembling the EVA suits in the orbital module, while Jing stayed in the re-entry module to keep an eye on the vessel operation.

The two began adaptive training after finishing assembling the suits. The training, which was to make sure the taikonauts could adapt to the low-gravity environment in space, lasted about 100 minutes.

The spacewalk, expected to last about 30 minutes, is scheduled to take place at 4:30 pm today. The whole process would be broadcast live on television, according to Wang Zhaoyao, spokesperson with the manned space program.