Rather than as being a sales partner focusing on a commission, consider being the exclusive distributor within your country. A distributor takes title to your goods, marks up as they think fit, and more importantly controls the experience of the buyers. An effective distributor is a lot harder for that supplier to get rid of from the supply chain over a simple agent such as amazon sourcing agent. The only problem here is you get some finance and product liability risks if you are the distributor, but the mark ups are higher, hence the reward may be valued at the risk. There are positives and negatives, so my point isn't to say distributor is usually better than agent relationship, and you should certainly explore your choices.
Consider being the company owner. Even if you are the sales agent, you may work with the factory to cultivate a local brand for the market. If you own that brand like a trademark and also the end buyers value the company, then in case the factory attempt to cut you out of trouble of the mix at the later point.
Look to get a sourcing agent that understands your industry and it has had success sourcing the kind of products you are searching for. Different regions within China focus on different products, therefore it helps if your agent understands what to do for the products you seek.
It comes without saying, but communication is a the heart of creating solid relationships. If a sourcing agent communicates swiftly and effectively along, it’s a great sign they may do the same when contacting and liaising with suppliers and manufacturers in China. Remember, poor communication may result in a host of problems further about the track.
Online sourcing platforms for example Alibaba and Global Sources, also rate their suppliers, which often can help in the shortlisting process. Alibaba, as an example, gives its suppliers “gold” ratings, which purchasers see being a sign of trustworthiness. However, you should remember that any supplier who pays Alibaba a yearly fee for premium membership might get gold supplier status, which raises the vendor’s visibility on the website. That is therefore accomplishment a very trustworthy reliability indicator.
There a variety of ways you are able to do this. You could ask the factory because of its audited accounts, check its Value Added Tax invoice, require product samples. You could also identify the factory’s Chinese name, its location plus the local government office under whose jurisdiction it falls. This office should have the factory’s registration records, which you are able to use to confirm the details they've got provided to you.