Not credible.
1. First of all, the information about Douyin selling incense and ash-glazed bracelets is not credible. Rumors like this are common on the Internet, but there is no concrete evidence to prove their authenticity.
2. Secondly, incense ash glaze is a national intangible cultural heritage. It is not commercial in nature and is not allowed to be sold casually.
3. Therefore, the relevant information on Douyin may be false propaganda or fraud, and you need to remain cautious and vigilant.
4. Finally, if you really need to buy ash glazed bracelets, it is best to choose formal channels to avoid being deceived for the sake of cheapness.