Economic Synergy (also known as 3L) was a political party in Hong Kong, composed of three members of the Legislative Council, Andrew Leung, Jeffrey Lam and Lau Wong-fat.

Formerly members of the Liberal Party, Jeffrey Lam, Andrew Leung and Sophie Leung resigned on 8 October 2008, saying they had not been able to communicate with the party, and were dissatisfied with its handling of the aftermath of its poor showing in the 2008 LegCo election.

The three of them constituted half of the Liberal Party's representation in LegCo.

In October 2012, the group formed the Business and Professionals Alliance for Hong Kong with other LegCo members from the pro-business sectors.

This article about a Hong Kong political party is a stub.