Lam's win came as no surprise, as widespread popular support for her rival John Tsang had no outlet at the ballot box.
John Tsang is the most popular candidate in opinion polls, but the public won't get a vote in Sunday's election.
Police block one congregation from marking the death of their founder and seize the church of another.
Rights activists say the crackdown has centered on supporters of evictee Fan Mugen, jailed in 2015 for killing two demolition gang members.
Local residents are complaining that they had 10 days' notice to be relocated miles away, and no agreement over compensation.
About 5,000 monks and nuns have already left, while nearly 250 still wait to leave, the abbot says.
But critics say the conviction failed to bring the masterminds to justice.
The top floors of many buildings are empty or inhabited by homeless children.
Local offices of the State Security Agency demand goods in exchange for the issuance of travel certificates.