PRO-BEIJING candidates have dominated Hong Kong's legislative elections, beating moderates and independents in the city's first public poll after China passed a resolution to ensure that only "patriots" could run the city.

Hong Kong leader Carrie Lam said during a news conference on Monday she was "satisfied" with the election, despite a 30.2% voter turnout - the lowest since the British handed Hong Kong over to China in 1997.

She said that the number of registered voters reached 92.5%, a record high compared to the 2012 and 2016 elections, when around 70% of voters had registered.

"For registered voters, deciding whether they want to exercise their voting rights in a particular election is entirely a matter for themselves," she said.

"In this election, 1.35 million voters cast their votes. They did not just return candidates of their choice to LegCo (Hong Kong's Legislative Council), and I think it was also because of their support for the improved electoral system."

Under the new laws, the number of directly elected legislators was reduced from 35 to 20, even as the legislature was expanded from 70 to 90 seats. Most of the legislators were appointed by largely pro-Beijing bodies, ensuring that they make up the majority of the legislature.

All candidates were also vetted by a largely pro-Beijing committee before they could be nominated.

Lam said that even if there was a high turnout rate based on "poor politics", such as the political polarisation during the period of political strife in 2019, that is "not something we should be glad to have".

The opposition camp has criticised the elections, with the largest pro-democracy party, the Democratic Party, fielding no candidates for the first time since the 1997 handover.

Lam said she expects that work with the 90 legislators would continue to be "very exciting" because they have different opinions on many social issues.

She is expected to travel to Beijing later on Monday on a duty-reporting trip, which she says is to give a full account to Beijing on the latest political and economic situation in Hong Kong.