C426 Old Master Yan Had Returned

"Yeah, it's a little late." Shen Geyao pursed her lips and nodded.

"But I called the alarm to wake up Grandfather. I didn't expect that even the alarm wouldn't wake him up. I don't know what happened today."

"Grandfather, I'm sorry. I asked you to wake me up."

"Silly girl, even if you're busy, you can't do research all day and night," the old man said softly