Huaqiangbei and the surrounding Shenzhen markets are useful for seeing product categories, packaging styles and price bands. They are not always the best place to lock a long-term supply contract on the first visit.
Many wholesale counters show samples. Production, labeling and export documents still need to be confirmed with the actual supplier. A sourcing partner can help separate showroom samples from order-ready SKUs.
If you cannot travel, send a clear product list. Market knowledge in Shenzhen is still useful remotely: similar products, accessory bundles and packing options can be checked locally and quoted back to you.