The public push comes despite a recent crackdown in China on LGBT activists and the wider gay community, as well as censorship of content related to homosexuality in films and on social media.
Feedback from ordinary people was solicited in November by the Commission for Legislative Affairs ahead of its meeting next week to discuss updates to the civil code, which mostly deals with matters relating to marriage and family.
The parliamentary body received more than 237,000 online suggestions and 5,600 letters on the topic, said commission spokesman Yue Zhongming at a press briefing on Friday.
These messages requested the clarification of the “definition of close relatives, improving the shared debt obligations of spouses and legalising same-sex marriage”, Yue said.
He did not offer details on whether same-sex marriage will be included in the final draft of the civil code, which lawmakers are scheduled to discuss from December 23-28.
Although China decriminalised homosexuality in 1997, and officially removed it from its list of mental illnesses in 2001, same-sex marriage remains illegal.
In recent years, censors have muted discussions on the topic on social media, banned the portrayal of homosexuality in films and even prevented the selling of rainbow-themed items online.