爱不释手 (ài bú shì shǒu): To like sth so much that one is reluctant to put it down (thích sth quá nhiều đến nỗi người ta không muốn đặt nó xuống)

As soon as Grandpa got that photo collection about old Beijing's hutongs, he put on his reading glasses and flipped through it page by page, smiling as he looked—he simply couldn't put it down.

For her birthday, my little sister received a fluffy teddy bear. From then on, she had to hug it to sleep every night, and even insisted on stuffing it into her suitcase when traveling—she was utterly inseparable from it.

He found an old purple clay teapot at an antique market. After returning home, he repeatedly wiped and examined it, and was even reluctant to put it down while eating—he truly cherished that teapot.

As soon as this new smartphone hit the market, many young people were drawn to its beautiful appearance and smooth operation, playing with it nonstop in their hands, almost unable to put it down.

She had searched a long time before finally borrowing that out-of-print poetry collection from the library. She sat by the window reading it all afternoon and was reluctant to leave—she really couldn't bear to part with it.

The first time the child got that set of colorful building blocks, he immediately sat on the floor building castles, assembling and taking apart again and again, playing so happily he couldn't stop—he didn't even hear his mother call him to dinner.