I like the site.
The search came back with right results and products where easy to find. I have used Alibaba many times with bad to great results. Though I like your site I do think you may want to address or at least think about a few things.
1. Manufacture contact info like address and phone number should be shown to unregistered visitors.
2. You need a rating system in place for people to rate the manufactures on your page. This will also add trustworthiness of such manufacture.
3. 'Related products of this company' should open in the same window. I had 20 windows open just from looking though your site.
4. Need to add Meta keywords and Descriptions to your pages.
5. No need to put your domain name in your title or your description on your main page. This is wasting space. Try and use some keywords as close to the beginning while still making it readable.
6. You may want to research what keywords your going to be going after. Right now it is unclear to me as to what they are. but I would think 'China Manufacture, China exporter, Made in China' Would have been in the mix. Try and use keywords in your page titles, descriptions and h1 tags etc.
7. I did not see a about us page.
8. I did like your contact us page
9. Check your sitemap.xml and make sure it meets the
0.9 protocol as this is what
Google adheres to.
10 You can add your sitemap.xml file to your robots.txt to help other SE craw your site. Info on this
found here
Over all I like the site but feel you have some
SEO and marketing work to do.