How many professional manufacturers of Feng Shui balls are there in Chengdu?

There are many manufacturers selling Feng Shui balls in Chengdu. As far as I know, there is a manufacturer specializing in the production, design, installation and maintenance of Feng Shui balls in Chengdu, and it is also the only manufacturer with a marketing history of ten years, namely Long Fu Stone Market and Hongxing Stone Factory, Sichuan and Guangdong enterprises. His Feng Shui ball products cover almost all counties and cities in Sichuan.