At the current autograph session, five to six hundred people can come, which is pretty good.

According to the rules of the book signing, each person can only sign two copies. Counting two copies per person, there were eight or nine hundred people here today.

In fact, most people only signed one copy, so the number of people attending the book signing today should be well over a thousand.

The early publicity was really not in vain.

Their bookstore originally prepared only 1,000 books, but yesterday they sold more than 100 books, and today there are only more than 800 books left.

After signing in the morning, there wasn't much left, so they quickly asked the publishing house to transfer a thousand copies.

There were two thousand copies in total, and now only about a hundred are left.

Yang Xiao actually didn't expect that today's situation would be so good. She originally thought that it would be best to guarantee six hundred and fight for one thousand, but this time it doubled.

After leaving the bookstore, Yu Dong did not choose to take a car, but decided to walk back to the hotel.

He had been sitting for too long today, and he wanted to move his legs more.

Yang Xiao and Tan Kai also accompanied him.

"You've really worked hard today. I sat there from morning till night. Other autograph sessions only last a few hours."

Yu Dong smiled and said: "I won't have many opportunities to sign autographs in the future, so I might as well just spend more time once."

Yang Xiao nodded. Yu Dong had discussed this with them before. He had his own job and usually had to find time for writing, so naturally he didn't want to spend too much time signing books.

As for the data of more than 1,700 copies, Yu Dong didn't take it too seriously.

This will have to be postponed until later. I signed more than 1,700 copies in just one day, and I’m really embarrassed to tell anyone about it.

The main reason is that transportation and communication are underdeveloped now. Many book fans in other cities don't know about the book signing. Even if they know about it, they can't get there even if they are far away.

The three of them walked slowly along Renmin South Road. It was already past six o'clock, but the sun was still high.

The sunset in Chengdu is much later than that in Jinling. Yu Dong didn't compare it deliberately, but based on his feeling, the difference was probably an hour.

Looking at the sun, Yu Dong suddenly asked a question: "If I run in the direction of the sun now, at what speed can I ensure that I can catch up with it?"

He originally asked casually, but Tan Kai held his chin and replied seriously: "When you say you can catch up, you should mean that you can always see it from this angle. If this is the case, you only need to ensure that the angular velocity is the same as the earth's rotation angular velocity.

Just the same. The latitude of Chengdu is about 30° north latitude. The circumference of 30° north latitude should be about more than 34,000 kilometers. Divide this circumference by 24 and you can get that the linear speed should be more than 1,400 per hour.

kilometer……"

Tan Kai calculated carefully, and then said: "These are rough calculations. If you want to calculate accurately, you have to consider many other factors. And the data I just listed may not be accurate. Even if the latitude is half a degree different, the distance

It will also be a lot different. How exactly is the position we are standing at now? We need to check it specifically to know."
Chapter completed!