hello, can you recommend a free international trade website ?

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I work for a export company now and my duty is developing customers from the internet. Now I encounter a problem. Everytime I register a business website and look for the buyers, they said I must be a charge member then I can get the contact information of the clients, such as email, phone number etc. so do you have any free website for exporter please share them to me, ok? thanx in advance!!!