Sindy joined CCM in 1991 and was sent to work with the Industrial Evangelistic Fellowship (IEF) in Hong Kong. In 1997 Sindy moved to Costa Rica to help establish a church. When two local brothers returned to pastor the church in 2005 after seminary training, Sindy served as a shepherd to build them up. In 2006 Sindy married missionary Derek Leung and they spent 2 years in Hong Kong to equip themselves in gambler rehabilitation ministry before returning to Costa Rica at the end of 2008. In early 2011 they were sent to Venezuela to establish the Gamblers’ Rehabilitation Program among the Chinese churches. Due to a visa problem in Venezuela they returned to Hong Kong. Derek furthered his seminary study and served in a church while Sindy had more training in gamblers’ family ministry. They started to partner with IEF Macau in gambler rehabilitation ministry in 2014. Due to an increase of Chinese immigrants and a lack of ministers in Central and South America, they answered the call from Ecuador where they work on nurturing and outreach ministries in a local church.