Which is true, Lanzhou Blue Star or Beijing Blue Star?

Lanzhou Bluestar and Beijing Bluestar are both real. According to relevant public information, the product category is the same as the standard patent number, except that Bluestar headquarters moved from Lanzhou to Beijing. The quality of Lanzhou Bluestar Factory is the same as that of Beijing Factory. After cleaning, the glass is clear and transparent, without water, not easy to get dirty and easy to clean.