Chinese trucks illegally penetrate Thai supply chains to collect durian directly from orchards in Chumphon, bypassing ports. Expert U Jiaranyoongpong attributes this to two drivers: intense regional competition from Vietnam eroding Thai durian's market dominance, and high energy costs forcing logistics optimization. Systemic corruption involving Thai officials enables trucks to clear 20+ checkpoints. Government must urgently implement the dormant CBTA (Cross-Border Transport Agreement) and establish inspection/collection points at Thai Market to formalize trade and cut illegal corridors before Thai durian exports face irreversible market loss.