The black market.
Shannu turned back into her sword form and hid in the void of space behind Gu Qing Shan's back.
Gu Qing Shan once again took Wang Cheng's form as he quickly walked through the streets.
Weapon shops, item appraisal shops, auction house, bars, restaurants, arenas, armor shops, technology central stores, slave market, recruitment central square, Drifting Sand world real estate center, unknown lifeform and event registration office, Black market Security office, Professionist Salon, Bounty hunter Association, Thieves' Guild, skill shops, and so on and so forth… Gu Qing Shan was walking by all sorts of buildings and structures.
According to Gu Qing Shan's original plans, he would have had to visit many of these places.
For example, the item appraisal shop------ he needed to know what the black branch's abilities were and its uses, under a controlled environment.