In ten years of decoration, I have never heard of local brands and third-tier products. Take your time when buying and listen to word of mouth. It has a good reputation and the quality of its third-tier products is also excellent.
Also, it is not at the same level as Guanzhu. Nowadays, there are more and more varieties of ceramic tiles, and sometimes you can see the same thing if they are not of the same brand. This shows that they are trying to sell things like sheep. They go to the manufacturer to purchase goods, name them by themselves, and then they become their own brands. The more people who do it, the more natural brands there will be. The word "frontline" has nothing to do with Dongjian. (I would like to add based on what I said on the first floor that I have been making ceramics for many years and have never heard of this brand. Your question is suspected of insulting the word "first line" or of advertising for Dongjian). At most, they can be regarded as third-tier small factories in Guangdong, most likely small factories and brands in Shandong, Jiangxi, Hunan, Faku, Wuyuan, Jiajiang and other places. After answering, please avoid being fooled)