BOHAI SEA, FROM 210600UTC TO 271500UTC JAN, ZONGHENG101 TRIAL VOYAGE IN THE AREA BOUNDED BY THE LINE JOINING : A:37-50.3N/120-24.0E； B:37-52.5N/120-24.0E； C:37-52.5N/120-28.0E； D:37-50.3N/120-28.0E。 CAUTION ADVISED.
