There are many PCB prototype manufacturers in China.
https://www.ourpcb.com/
OurPCB provides PCB Manufacturing and PCB Assembly services.
There are ten solder mask colors to choose, and I prefer matt blue, the main is that no fee is charged.
WellPCB http://www.wellpcb.com
WELLPCB is focusing on online prototypes orders, to meet the requirement of Low cost, Fast delivery, Easy order for customers around the world.