Zut! My work gets stagnant...

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I'm a foreign trader in a factory. My job is to explore more and more customers around the world. Since half a year ago, I've been sending so-called sales emails to the related companies which I found through the Google and so on. But 99.9% of them gets no-reply. I know it well that these letters are regarded as SPAMs to the receivers and I feel sorry for that. But except emails, I can't think any way else out. I'd like to found something like MYLOT where I can put my sales post on it and get a high browsing. Anybody can suggest me about the common sales BBS to me in your country? Thank you very much in advance!