Hong Kong voters are casting their ballots in legislative elections that will help determine the eventual shape of the full democracy Beijing has promised the former British colony.

Residents headed to polls Sunday across the semiautonomous region of China. The election results are expected Monday.

The amount of support voters give to pro-democracy and pro-Beijing camps will indicate the level of desire for political reform in Hong Kong.

Beijing has pledged to allow Hong Kong residents to choose their leader by 2017 and all lawmakers by 2020, but no road map has been laid out. Lawmakers elected in Sunday's polls will help shape the arrangements for those future elections.

Nearly 3.5 million voters are choosing 40 representatives, while 30 others are chosen by business and special interest groups.