Shen Zhiyu went into the room, sat down beside the bed, picked up a flower on the table, put it between the wings of his nose, sniffed it, and said with a smile, "it smells good."
Xia Beiqing put down the tools for making dry flower bookmarks and picked up a pen and paper to write. 
——Mr. Shen, I have made a bookmark for you.
"Thank you." Shen Zhiyu's eyes drooped behind the lens. After a moment of silence, he said the words he had thought for a long time: "incline to the north, I'm going out this evening."
Xia Beiqing nodded and didn't ask much, thinking that Shen Zhiyu was just a simple trip out.
Shen Zhiyu continued: "it may take a few days to come back."
Hearing this, Xia Bei tilted his head and looked at Shen Zhiyu with astonished eyes. He wrote on the paper with one hand and grasped Shen Zhiyu tightly with the other, just like a child who was extremely afraid of being abandoned.
——Mr. Shen, where are you going?
Shen Zhiyu reached out and stroked Xia Beiqing's white cheek, and said softly, "don't worry. Do you remember the old friend I mentioned before? He had a car accident. It's very serious. My family and friends are not around. I'll take care of him for a few days and I'll be back soon. "
Xia Beiqing blinked and stared at Shen Zhiyu. He still didn't dare to relax.
Looking at the boy's suspicious appearance, Shen Zhiyu takes out his mobile phone, turns out the picture he has prepared and presents it to the boy.
"You see."
In the photo, a man dressed in gauze, wearing a ventilator and full of instruments is lying in the intensive care unit, apparently dying.
Shen Zhiyu paid for this picture and asked others to disguise it like this. He knows that Xia Beiqing is sensitive, fragile and suspicious. He prepares this picture to make Xia Beiqing feel at ease.
Seeing the photo, Xia Beiqing released Shen Zhiyu's hand and wrote on the paper.
——It's serious.
He knew what it was like to be on the verge of death, and there was a trace of pity in his eyes.
"I got a life back, so I want to take care of him for a few days, OK?" Shen Zhiyu asked.
——How many days?
Shen Zhiyu opened his mouth to the young man's eager and aggrieved eyes. When he reached his lips, he swallowed his words and changed his speech temporarily. 
"Two or three days, just two or three days, and I'll be back."
Xia Bei tilted his mouth and nodded with a smile.
"Wait for me at home. I'll let Hua Yinong come with you."
Xia Beiqing immediately picked up a pen and paper to write.
——Mr. Shen, I can do it alone.
Shen Zhiyu knew that Xia Beiqing didn't want to be regarded as a disabled person who couldn't do anything, so he said with a smile, "of course I know you can do it alone, but I won't be at ease. Beiqing, don't let me worry, OK?"
Xia Beiqing slowly lowered his head and said nothing more.
In the afternoon, Shen Zhiyu simply picked up some clothes and put away all the things at home, so that Hua Yinong could take care of Xia Beiqing conveniently. The precautions were all written on the label, because once he went to extract bone marrow, he might not be able to receive a phone call at any time.
After everything at home, the mobile phone suddenly rang. It was he Jiayi.
After connecting, he repeatedly asked at the other end, "are you sure you want to extract bone marrow?"
Shen Zhiyu sat down on the sofa and said with a smile, "I've already packed my laundry."
He Jiayi's voice was a little urgent: "you... It's too late for you to go back now! Extracting bone marrow is not as simple as extracting blood. It's very harmful to the body! "