The bracelet I bought in xiuyan jade was very bright at first, and I tried to save jade, but why is it getting darker now?

That's probably because your jade bracelet is short of water ~ jade needs to be placed in a damp place. Unlike jadeite, which needs maintenance ~ jadeite generally does not turn black ~ When you don't wear jade bracelets, you can take them off and soak them in water for one night (this method is enough once a week at most, and it will be dewaxed after soaking for a long time). Another way is to find a plastic bag. When my shop opens, you can come and have a look at it ~ I'll give it to you cheaply if you like ~ I promise it's genuine ~ Ye ~ ~ ~ ~ ~