The Number One Name in Unparalleled Plastic Mold Products - Dong Guan Sincere Tech Apart from the regular excellent business, countries where the economy is back on track, Sincere Tech has done record-breaking business. BriefingWire.com, 5/14/2021 - DONG GUAN (May 14th, 2021) - Dong Guan Sincere Tech has once again become the leading Plastic mold maker and supplier in China. With the Chinese and other first world countries' economy back on track, Sincere Tech posted record breaking quarterly revenue. According to reports, they have been the leading supplier of various plastic mold parts and components to major businesses, both nationally and internationally. And it is not just plastic molding parts, Sincere Tech also is also into contract manufacturing for plating, painting, silk-screen and assembly.