Seeing that there had been no movement in the house, Tang Xian changed his words: "It doesn't matter if you don't know, I can't finish my meal by one person, so I'll send you some."

With a squeak, the door opened a crack, a vicissitudes of life tentatively stretched out the door, holding the bowl in his hand and quickly retracting the door, and then the door closed again, and when the door was opened and closed, Tang Xian only saw the dark room, followed by a fishy smell.

"What did you find"? After Tang Xian returned to the house, he heard Luo Qi'an's lazy voice, Tang Xian shook his head and whispered: "Don't let him in, don't speak, his life should be very difficult, I opened the door for a bowl of rice, only to see that his hands are calloused, and there is a very bad smell in the house."

Luo Qi'an jumped back into Tang Xian's arms: "Eat first, and then we will go downstairs and knock on other people's doors."

There are no windows in the corridors, and a small light bulb hangs on each floor, glowing a dim yellow. Knocking from the twentieth floor to the first floor, only 801 opened the door, and 801 was the door opened by Lao Chen's family and Lao Chen's wife.

"I'm a new detective, and I want to ask about the building." Lao Chen's wife was very thin, her eyes were shining, she approached Tang Xian and whispered: "We are going to be demolished, those bad people outside want to lower the demolition money, and they want to pretend to be ghosts and drive us away, our building can be united, but united." After speaking, he scratched his head again: "Look at me, people can't help but say a few more words when they are old, and Lao Chen will tell you something at ten o'clock tomorrow morning, so I won't say more."

While the door was closing, Luo Qi'an jumped into the house, and something entered the house, obviously scaring Lao Chen's wife.

"I'm sorry, I'm sorry, this is my cat, I'll take him out."

Knowing that it was a cat, Lao Chen's wife breathed a sigh of relief: "You wait at the door, I'll drive him out."

Tang Xian took the opportunity to look at the house, Lao Chen's house was not separated by a wall, the space was much larger, the windows were brighter, and he could see two bedrooms with hidden doors, and the living room also had no TV, only a dilapidated radio.

Seeing Luo Qi'an coming over with small steps, Tang Xian squatted down and hugged him into his arms: "Sorry, I'm sorry to disturb you."

From the 7th floor to the 2nd floor, no one opened the door, and when he reached the first floor, Tang Xian saw Lao Chen sitting by the big iron gate with a gloomy face and smoking. Seeing that it was the detective he hired, Lao Chen burst out laughing: "Why did you come down, the elevator can't be used, how hard it is to climb around on the twentieth floor."

"I wanted to ask about the situation first, but I don't know why, they don't open the door."

Lao Chen's smile was even bigger: "Because someone has been pretending to be a ghost recently, making everyone panic, tomorrow morning at ten o'clock, everyone will be on the first floor, you can ask at that time."

Seeing that Tang Xian was about to leave, Lao Chen called out to Tang Xian: "Since you are down, you can bring your mobile phone to your companions, this is left by the previous residents, and I will use it for you first, so that you don't have to run up and down, but this signal is not good, you call a few more times."

Before sending the mobile phone, Tang Xian looked at the six identical PHS in his hand, and a piece of paper with the unit number was pasted on the back of the mobile phone, and the contacts in the mobile phone only had the unit number plus the person's name, and the text messages and call records were deleted completely.

"Xiaomei, I'm An Qi, Lao Chen asked me to send you a mobile phone", Tang Xian knocked on the door of 401. Xiaomei opened the door, with some sweat on her face: "We are cleaning up the room, the room is too messy". Tang Xian took a look, and it was the same as Lao Chen's house, it was a two-bedroom and a living room.

"Lao Chen said that the mobile phone was left by the previous residents, let us contact by phone, no need to run up and down the stairs, the information of all the residents in it is there, and the unit number of the previous residents is pasted on the back of the mobile phone, which is exactly our corresponding rooms, how many mobile phones do you want"? Tang Xian explained.

"Just give me 401, we only need one".

Akui and Li San also chose the mobile phone corresponding to their unit number.

Tang Xian found that Akui's room was a two-bedroom apartment, while Li San's room was the same as in 2002, separated from it.

Tang Xian was tired from lying on the bed and didn't want to speak, Luo Qi'an pulled the mobile phone with the numbers 1401, 1902, and 2002 with his claws.

"The 2nd to 9th floors are two bedrooms and one living room, the 10th-20th floors are one bedroom, it is known that no one lives in the two rooms, there should be 28 households, we will go down early tomorrow, there is a problem with 702."

Tang Xian also picked up a mobile phone and flipped through it: "The original resident of 701 was called Wang Cuilan, why has it been changed to 702 now?"

Luo Qi'an was a little sleepy: "The original residents of our rooms all look like women in their names, go to sleep, and get up early tomorrow."

"Big guy, go to sleep, I'll keep vigil", Tang Xian let out the single bed and motioned for Luo Qi'an to sleep.

Luo Qi'an lay on the side of the pillow: "It's okay, sleep, there is me."

After the power went off at twelve o'clock in the morning, the whole room fell into darkness, because Luo Qi'an was by his side, and Tang Xian fell asleep unconsciously.