Chief Secretary Eric Chan says it's extraordinary that Hong Kong scientists are joining the country's latest Antarctica exploration, with icebreakers Xuelong and Xuelong 2 setting sail along with a third ship on Friday.

The mission to the South Pole is China's 41st and will last for more than half a year.

Speaking at a ceremony marking the ships' journey, Chan said Hongkongers' participation in the mission marks an important milestone.

"Not only does this show the country's recognition of Hong Kong's polar scientific research, it also highlights how the SAR can play a pro-active role in the country's scientific research missions," the minister said.

Chan expressed the hope that local scientists can make full use of the country's platform to conduct solid research and make greater contributions to the nation in science and innovation.

He also noted that this year is the 40th anniversary of the start of China's polar expeditions, saying the country's efforts and achievements attract global attention and reflect a powerful nation's responsibility to build a community with a shared future for mankind.