one month.

three months.

a year.

Three years have passed.

During this period, we traveled around the world and experienced countless dangerous situations. Master taught me a lot, from combat skills to herbal medicine, to astrology, and even languages of various countries. Now I can live alone.

In the past three years, master has been trying to deduce the rules of where people who pass through arrive, sometimes all night, but he has never succeeded. So he temporarily put the idea of looking for rules and took me back to the cave to wait for the arrival of other crossing bodies.

"If you can't take the initiative, then wait ." He said.

The intense fighting and long journey made master's body worse day by day, and sometimes even coughed to faint.

Of course, my feelings for master have deepened day by day. This stubborn old man has become my family.

Nevertheless, I can still clearly feel that he has something important to hide from me.

"Master, are you hiding something from me?" I finally couldn't help asking.

"What did you say! It's out of thin air!" He said angrily.

"How can there be something in nothing? That means there is still something." I quibbled.

"Hum!" He said with a strange smile, "there are things out of nothing everywhere, not to mention here."

"Where? Give me some examples." I casually talked about topics I didn't want to continue - teasing the old man is also one of my hobbies.

Master pondered for a while and slowly recited a sentence. Since then, I haven't talked to him about it again.

The sentence goes like this:

"Our world."