If you use Truncheon of king to upgrade your equipment, it will be bugged and you will not be able to upgrade it unless you add some info to your game file.....
If you already made the mistake and used this npc, then all you can do is be able to upgrade further, is to add a few lines of code to your personal computers game file.
The Helmet and armor will upgrade (145 to 148) but they end up with weird names and then cannot be further upgraded at the Equipment Enhancement Master OR the Compound Grand master or Suit Compound Master.
The "bugged" Uniform is named RZB000118 and shows as profession level 145 even though the icon shows the 148 King armor. The hat is named RZB000117 and also shows as profession level 145 even though the icon shows the 148 King helmet.
To edit your files:
Technically posts that tell you how to modify game files are illegal...
But because this is a Game breaking or at least stopping/ending bug for those who can't upgrade... I will allow all posts or re-posts explaining how to fix this.
Find the namelist.idres file in your voyage century online file
File path examples;
E:\Program Files\Voyage Century Online\voyage\resource\UI\lang\china\mapped\namelist
C:\Program Files (x86)\Voyage Century Online\voyage\resource\UI\lang\china\mapped\namelist.idres
To open the Namelist file;
Right click the file name and choose "open in notepad"
To go to the areas that has RZB prefix either go to about line 53359
or use search; ctrl+f on "RZB"
Type in info on picture below;
black "ETX" is not important/ necessary.
SAVE your modification/edits!!
You may need to be Administer on your computer or have permissions to save this file (to save the edits).
USA; Sunday March 10th.
Europe; Sunday March 31st.
Look up your Country; https://www.timeanddate.com/time/dst/2019.html