You can change the name and icon of the union label. Right-click the label of the union warehouse and you can select the icon. If you can enter text on the top line of the icon, such as leather goods, if you haven't done it again, it is the label. For the words "一", don't forget to click OK after making changes.

Story background (Blackstone Scourge)

After experiencing the invasion of natural disasters, the continent of Azeroth was devastated, Felwood became a dead land, and the wanderers of Tirisfal Glades were devastated. The rotten body that had died long ago but stood up again, Night Town was filled with thick fog all day long, undercurrents surged in the desert of Silithus, the Kingdom of Lordaeron was destroyed, Illidan betrayed the night elves and was exiled to the outside world.

Arthas, the former prince, finally ascended the Frozen Throne and became the new Lich King sitting in Northrend. It seems that the war has temporarily subsided because of the fragile agreements reached between the war tribes and the Alliance. It seems to have been gradually forgotten.