What does "climbing ash" mean in Jianhu dialect of Jiangsu Province?

It's also called picking up dust. This is a word to describe incest, which refers to the incest behavior of father-in-law and daughter-in-law having sexual relations. There are many stories and legends about the origin of the word "picking up ashes". One way of saying this is: in the incense burner in the temple, there are a lot of tin foil that has been burned for a long time, forming a large piece, and the monk picks it out and sells it. Later, people near the temple found out and came to steal tin from the stove. Because tin daughter-in-law has the same pronunciation, it is extended to the code word of old man stealing daughter-in-law. There is also a saying that when people make tin pots for people, they deliberately scrape off more tin in the process of cleaning the molding sand, and the scraped tin is hidden in the furnace ash. Nowadays, people who play with gold and silver jewelry also use this method to steal scraps from customers. Compared with some legitimate craftsmen, this technique is a bit unsightly. Folk masons always leave some tails when making things for people. When buyers buy them back, they need to find masons in their own village or nearby to eliminate this redundant work. It is a custom in rural areas to give some money even for a meal at noon. This is a way for masons to take care of each other.