* Reason of congestion（等泊原因） 

1) Vessel ; Many vessels are waiting for discharge.
（由于等泊??的船多。）
2) Weather ; Port closed due to dence fog, strong wind, heavy rain, snow, and etc.
（由于大?，大?，大雨等天?原因）
3) Others ; Channel closed due to sunken vessel, collision, navy drill, and etc.
（由于?船，?撞，?事演?等原因?致航道??等特殊情?。）