Hyson is graded into the following three categories: Mi Si, Cheng Si and Fu Si. While hyson tea is often thought of like a low-grade or mediocre quality tea, young hyson is considered high quality. Common Certification: 1. Health Certificate. 2. Phytosanitary Certificate. 3. Fumigation Report. 4. Tea board clearance certificate. 5. SGS Report as per buyer requirements. Place Of Origin: Assam. Port Of Loading: Kolkata Port (CPT Port). Payment: LC Or Discuss With Buyer. Delivery Time: Shipment within 10 days.