Multiple suppliers, one deal.
Most of my clients buy from several suppliers at once. Where required, I act as the seller of record: I purchase from the Chinese suppliers under my company, and you receive one commercial invoice covering all the purchases, in one currency. However many suppliers and whichever currencies they work in, the payments to the factories run on my side. Goods from all suppliers come together at the warehouse and leave as one consolidated shipment. Or you pay the suppliers directly and I manage execution — either way works.
Shipping from China.
If you have your own forwarder in China, I hand the goods over to them. If not, I arrange the shipment myself — sea, air or express courier.
Documents.
Contract, commercial invoice, packing list, bill of lading — the documents you use for import clearance at destination. Certificate of origin where the shipment requires it. Cargo insurance is not automatic: you say whether you want it, and I arrange it. If your side needs the documents drawn up a particular way, you specify — I follow.
Reporting as it runs.
Every payment is followed by an updated statement of account with the related record. Where the goods pass through the warehouse, you get a warehouse report: photos, weights, packing.