China's GACC is enforcing sulphur dioxide limits (50 ppm) on longan, and 162 containers were rejected from eastern Thailand in 2025. Orchard-gate prices have fallen to 20-25 baht/kg, and some buyers who pre-contracted at 32-35 baht/kg face losses. Peak harvest runs December to January. Growers, orchard buyers and packhouses should check sulphur compliance, avoid over-committing to forward contracts, and watch for export-route changes if containers are returned.