Before a competition of this sort would formally begin, the two sides would normally coordinate measurements and the overall layout, such as the position of pillars and the height of the roof, to avoid a mismatch at the finish.
正式「對場」之前，兩方匠師會協調各部格局及尺寸，例如金柱的位置、廟頂的高度等，免得到時候「拼」不起來。