The requested vessel with name YONG CHANG and MMSI:0 and IMO:6409753 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
YONG CHANG 8709133 341176000 SINGAPORE Dec 05, 2017 18:42 UTC

Also, you may try to find the vessel in our comprehensive Vessels Database or track this ship on the map.