I am not so familiar with Global Sources but according to their website, they provide access to suppliers based in China, and the company has been existing for several years -
Global Sources is a leading business-to-business media company and a primary facilitator of trade with Greater China.
Sorry but we cannot speak on their behalf regarding the safety of using Chinese suppliers from their website. We also have no means of viewing these suppliers.
However, we do have published articles on scam prevention and on dealing with Chinese suppliers. You might want to read through them first before dealing with any China-based suppliers - Link hidden: Login to view
You can also let us know what products you are trying to source and we can try to find suppliers listed here in SaleHoo, China-based if you wish.
Looking forward to hear from you shortly.