This method was used for two reasons. First, it allowed a relatively high kiln temperature to be used, without the danger of cracking, and second, cement could be poured into the hollowed-out section to fasten the piece to a temple wall.
這種做法有二種原因：其一是可減少烘燒的時間，以防止脹裂；其二則是燒成後，可在挖空處灌進水泥，以便黏貼在廟壁上。