"The second is the endpoint. In other words, from this point until the present moment, the target object has not been moved and will not affect history."

"There are so many restrictions! No wonder you have to research so much every time you look for treasures!"

As we chatted, it was almost dusk.

This time Xiao Lu doesn’t plan to go out. He has been hanging around for most of the day and it’s time to do something!

After ordering takeout for a change at Cross Street, Xiao Lu exclaimed, "Luoyang has so many soups! They're almost as popular as Guangzhou's porridge!"

"You're not going to say next that you want to drink Yangcheng's porridge. When are we going to Yangcheng for a stroll?"

Lao Lu was still taking notes when he retorted without even raising his head.

"Oh! The person who knows me, Guansheng, is Lu Guansheng!"

"Show off!"

The next day, Xiao Lu did not go out early in the morning, but instead studied the whereabouts of the recipe in the B&B.

Tracking the history one by one took too much time and energy. He lost the clue again when he couldn't find anyone selling second-hand goods at the crossroads.

At that time, the boss's ancestors had only set up the stall for two days, and there were many people selling mutton soup, although none of them were authentic.

Xiao Lu thought of the landlord. Small figures were difficult to trace, but landlords often lived in the same house for generations.

There were not many landlords in Luoyang, and there were only two landlords who opened money shops, and the time was at the end of the Northern Song Dynasty.

In the year when the Northern Song Dynasty moved its capital, it is said that the boss's ancestor's grandson had grown up and also opened a shop on Luoyang Cross Street.

Combining these two points, Xiao Lu quickly found the person.

After a year of follow-up, he finally located the person and the operation became much easier. Using the techniques he had learned from watching Lao Lu operate, he began to shorten the time window.

He started looking on the first day of each month until he found the month after his escape. In this way, it only took Lu Guansheng ten minutes to find the one-month gap.

At the beginning of April, there were still people running the store, but at the beginning of May, it was empty!

Then he positioned himself again every week and finally narrowed the time window to late April.

By mid-April, the war had already spread to Luoyang, and the mutton soup restaurant had closed. But there were still people living upstairs. They looked like they were packing their belongings, planning to flee Luoyang before the war arrived.

Xiao Lu continued to watch day after day, and finally a few days later, he saw the shop owner and his family get on a carriage and leave the crossroads.

The carriage traveled south to the north bank of Zhaoping Lake. By then, the official road had been blocked, so the family had to rent a ferry to the south bank.

As luck would have it, there were so many people and they left the recipe on the carriage when they were loading the luggage onto the boat!