It is popular to organize activities to build sand pagodas by the seaside to offer as a Buddhist offering. In some areas, sand will be dug up from water sources to build sand pagodas, called "building Nam Lai sand pagodas". However, as time passed, this tradition began to fade away. Transporting sand to the temple changed to buying sand to bring to the temple instead. Later, it was called by a different name, "Wan Lai" or "Wan Lai Tradition".
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