英国采购需求：中药材供应商，批发中药饮片，散装中药材，中药材供应商，中药饮片经销商，中药材批量采购

I'm interested in sourcing Artemisia Annua and would appreciate it if you could provide me with the pricing details, including any bulk purchase options. Please let me know about the available grades, possible packaging sizes, and any relevant certifications or quality standards that your product meets. Additionally, it would be helpful to have information on lead times for orders and shipping options, as well as any minimum order quantities. If you have product samples available, I'd love to discuss that, too. Looking forward to your prompt response with all the necessary details!