The Master's Hall is a distinctive feature of Thousand Star Immortal City.
Artifact Refiners have their Refiners Guild, Talisman Makers have their own guild, and Array Masters have their guild as well...
Even Spiritual Plant Farmers have their professional guild.
It's akin to the trade unions of Wang Chen's previous life, where industry insiders could apply to join and obtain the corresponding professional certification through assessment.
Wang Chen wanted to open an equipment shop to accumulate funds. Though he could open it without joining the Refiners Guild or obtaining professional certification, without any hindrance,
if he didn't hang the Artifact Refiner's professional emblem on his shopfront, then he couldn't expect business to come knocking on his door.
Because in Thousand Star Immortal City, whether it's weapons, equipment, Talismans, Pills, Spirit Rice, or Spiritual Tea, nearly all have professional emblems to adorn their façades and to attest to their strength.
