Bao Bao and Bei Bei nodded obediently.
Bao Bao hugged the old Mrs. Mo and said in a milky voice, "Grandma, don't worry, I will come back early, and, I will think of you three times every day."
The old Mrs. Mo's face was full of gratification as she said, "My Bao Bao is really good."
Bei Bei kissed the old Mrs. Mo and asked, "Grandma, just wait at home for us to come back nicely, I will miss you too, and I'll bring you a gift when I come back. What gift would you like, Grandma?"
The old Mrs. Mo patted Bei Bei's little head and said, "As long as it's a gift prepared by Bei Bei, Grandma will like it."
Since growing up, Bao Bao and Bei Bei had only left the old Mrs. Mo for a period of time when they were two years old; at all other times, they had been by her side. Now that the two of them were going to the mundane world, the old Mrs. Mo was still quite unaccustomed to their absence.
After saying goodbye to the old Mrs. Mo, the family of four boarded the time machine.