HK's first astronaut Lai Ka-ying hard at work on Shenzhou-23 mission

China's Shenzhou-23 space mission has been in motion for the past three weeks.

Timothy Li takes a look at how the city's first payload specialist Lai Ka-ying has been adapting to space and the types of scientific experiments the crew had conducted over the past week.

The latest footage released by the China Manned Space Program's social media shows Hong Kong's first astronaut Lai Ka-ying and fellow crew members Zhu Yangzhu and Zhang Zhiyuan working in the Tiangong space station.

Occasionally switching into more casual shorts, Lai's hair could be seen floating like the tail of a horse as it suspends in zero gravity.

Throughout last week, the crew conducted experiments and research on samples related to cell biology, as well as having completed their fourth installation of radiation biology exposure devices outside of the station modules.

But the astronauts themselves did not exit from the space station during the installation process, with only the items installed set to be exposed to space radiation over the course of five months.

This as the trio completes a full-system emergency pressure drill where they coordinate with each other to swiftly gear up for the exercise.

Meanwhile, the crew members are also seen cleaning the interior of the space station and organising their supplies, with Lai remaining in good condition.

To ensure their bones remain in a decent state, the astronauts run on treadmills to maintain their physical health.