Hello, 

I am looking for Quartz / Engineered Stone slabs from China and want to visit your factories. I am currently in Xiamen. I want to contact the following manufacturers: 

OPPEIN Quartz Stone, Sinostone Quartz Stone, Fasa Quartz Stone, Vemy Quartz Stone, and Bitto Quartz Stone. These manufacturers are known for their production. I want to visit the one that is closest to Xiamen.