As a Cultivator, How Do I Pretend to Be an Ordinary Person?

Gao Lin traveled through the world of cultivating immortals for thirty years. Only when he came back did he realize that the real world had only passed for one second, and he also brought with him all his cultivation from the world of cultivating immortals. In the sea, there can be countless fish, or there can be no fish at all, but there can never be only one fish. When a fish cannot find other fish in its entire life, it is most likely to be locked in a fish tank.