Lydia joined CCM as a missionary in 1989. She worked with the Peace Evangelical Centre of Hong Kong in church planting in Macau. From 1993 to 1995 she worked with a local church in Macau to train, counsel, and evangelize new immigrants and contract laborers. Since 1995 Lydia has been working with the Industrial Evangelistic Fellowship of Macau and the Peace Evangelical Centre of Macau. She befriends the contract laborers, leads them to Christ, and helps them to experience God's love in their daily lives through various activities, services, and visitation.