There are many forms of sermons, but they all convey the gospel message of Jesus' salvation. Call those who are willing to accept the gospel by singing, dancing, witnessing and preaching, and some will prepare small gift packages and wrap them in bibles, CDs and gospel leaflets. Some will prepare meals, while others will prepare snacks or melons.
There are Bible sermons, Father's Day sermons, Mother's Day sermons and so on.
The invited guests are relatives and friends brought by unbelievers.