In many legendary stories, when powerful protagonists encounter unexpected events, they often conceal their identities to understand the sentiments of the people and solve problems.
They usually choose a map that lacks presence, where they interact with a group of NPCs who also lack presence.
We usually refer to this behavior as "playing the pig to eat the tiger," and refer to these places that provide the setting as small towns or small cities.
Gu Yu, of course, was not playing the pig to eat the tiger, but rather, being a mighty fighter, felt a subtle mutual recognition with his peers, which made it hard to conceal his real identity. That's why he used his Second Primordial Spirit to head north to investigate the temples of the Eternal Mother in various places.
