The director of the Hong Kong and Macau Affairs Office, Xia Baolong, on Tuesday urged the Hong Kong Coalition to make greater contributions to the SAR and the country's rise as a strong nation.

He made the comments in a congratulatory message for the group's fifth anniversary which was read out by its secretary-general, Tam Yiu-chung.

Xia was also quoted as saying there should be greater collaboration with the international community, as Hong Kong connects with the country's strategy in a pro-active manner.

He told the coalition to thoroughly learn from the spirit of important speeches of President Xi Jinping, and proactively recognise, respond to and seek changes.

The head of Beijing's liaison office in Hong Kong, Zheng Yanxiong, was among those attending the event in Wan Chai.

He said one of the ways to make greater contributions is to fight against suppression by external forces like the United States, while defending national interests and maintaining the SAR's unique status.

Zheng then switched from Putonghua to Cantonese. "The world's very chaotic. China's really doing well. The rise of the East is so apparent, the tables have turned," he said, drawing cheers from the audience.

"There's no need to worry, the safest place is Hong Kong."

The liaison office director also said despite changes, people should maintain their unwavering confidence in Hong Kong, believing in the fact that the uncertainties and negative impact of the external environment cannot stop the SAR's rise to greater prosperity.

Chief Executive John Lee, meanwhile, said amid the uncertainties, Hong Kong has to find opportunities.

He stressed that despite external provocations and bullying, the SAR will continue to be a free economy, uphold a simple, transparent and fair system, and stay open to the world.