Hong Kong's talent policy has brought in young professionals who have helped drive the city's development despite not all of them deciding to eventually settle, according to labour chief Chris Sun.

The labour and welfare secretary also said the time spent in Hong Kong by successful candidates under the Top Talent Pass Scheme could help the economy.

"It is within our expectations that some adapt well to Hong Kong, find their own opportunities for development, and contribute to the economic development," Sun told RTHK's Overview Policy programme.

"But there are always people who, no matter how capable they are, are not able to get used to living here. It isn't a big deal. This will simply be a peaceful breakup."

The minister also said the knowledge and investments brought by professionals who came to Hong Kong through the talent scheme have boosted the city's development.

"There will always be a lot of new professionals coming to Hong Kong, who are young, usually aged between 30 and 40. Some bring with them money, while others bring with them technology," he said.