This World Has Been Pierced Through a Sieve

Qin Geng traveled to a strange world. The order of this world has collapsed. From high-ranking officials to ordinary people, everyone may be a time traveler. Due to too many people traveling through time, the world order is about to collapse, and Qin Xian's mission is to find all kinds of time-travelers from the vast sea of ​​people and bring them back to their original world. In order to facilitate the selection, Qin Xian placed several questions at the gate of the city, and everyone who entered the city had to answer them. Hydrogen, helium, lithium, beryllium, boron———————— Odd changes to even, unchanged———————— How are you?———————— Gu Shiyi was the eldest son of Prince Annan when he was young. He entered the military camp at the age of fifteen, but within a year he took the great power of the general into his own hands. But then Gu Shiyi began to fall into an inexplicable lethargy. When he woke up for the first time, Gu Shiyi found that he had changed from a military general to a civil servant, serving as a fifth-rank minor official in Kyoto. When he woke up for the second time, he was disgusted by King Annan and took away his throne. When he woke up for the third time, he became a farmer studying grain growth. When he woke up for the fourth time, he became a salesman walking around the streets. In just two years, Gu Shiyi's body was occupied by four different people, each of whom would leave a strange memory. They appeared suddenly and left so quickly that even if Gu Shiyi wanted to find them, there was nothing he could do. Until one day when I entered the city, I saw those strange problems. Gu Shiyi immediately stared at the person who asked the question. Intention: down to earth