Build a big profit and help build public facilities, such as opening canals to divert water, building embankments, building bridges, relieving the poor, etc. If you have the money and the ability to contribute, it will be considered a big profit for the construction. Whether it is official or private, everyone will say that building bridges and paving roads is a great merit that benefits future generations, simply because building bridges can save millions of people, and those who pave roads can benefit thousands of people. Therefore, wherever we raise funds to build roads and bridges, we can easily see merit monuments engraved with the names of the investors. In Jianchuan County, Dali Prefecture, there is the Jinlong Bridge, a wind and rain bridge with the same name as the Iron Chain Bridge on the Jinsha River. There is also a couplet on the bridge pavilion: Chongshan Huaide, the heart shines brightly, the sun and the moon, building bridges and paving roads, accumulating children and grandchildren. This is evident.