+86 138 2560 3806(China) | +84 027 1382 6888(Vietnam)
+86 766 859 3323(China) | +84 027 1382 6888(Vietnam)

llang@optimastone.com
lynn@whiterockstone.com

Yunfu International Stone Industrial Park, Silao, Yuncheng District, Yunfu, Guangdong Province, China.
Quoc Lo 14, Doi 2, Ap3, Xa Dong Tien, Huyen Doing Phu, Tinh Binh Phouc, Vietnam.