The girl I like said in a circle of friends: I want to ask weakly, have you been to Shacheng? How to understand the meaning of this sentence

Have you ever seen traveling through your world?

There is a saying in it: a person's memory is a city. Time erodes all buildings and deserts, all tall buildings and roads. If you don't advance, you will be buried in the sand. So we burst into tears and looked back step by step, but we could only move forward.

Occasionally, I return to Shacheng in my dream. Those street lamps and footprints are very clear, but you can't touch them. Once my hand is caught, the whole city will collapse. Smile at your happiness, bury your blue sea and blue sky, bury all the shadows between us.

Even if I go forward, I pass you by.

I pass by your world, and you just pass by each other's world.

Even if we are lonely and silent, we are still talking nonsense, and we are old friends with silence.

Mao didn't show up that day, and he didn't answer my phone. Go to the counter of Electronic City to find him. The boss next to me told me that he had not come to do business for several days.

Finally, I met him occasionally in a pub. He drank so much that he blushed and couldn't open his eyes. He asked me, "Zhang Jiajia, have you ever been to Shacheng?"

I thought about it: "Is it Dunhuang?"

He shook his head and said, "No, it's a city with only sand."

I said, "You're drunk."

He fell asleep at his desk.

This is a small fragment in the novel. Mao broke up with his favorite person. After drinking, I said Shacheng. So, don't comment, since I don't understand the meaning of this sentence, it should be a very profound sentence. ...