Upon hearing this, both Xia Xiao and Gao Jiaxing understood.
After they finished eating, Gao Jiaxing voluntarily started to clear the dishes. Mrs. Xia didn't stop him, instead, she subtly kicked Xia Xiao with her foot.
Xia Xiao chuckled and also went into the kitchen to help. Gao Jiaxing said, "Why are you here? There are only a few bowls; I can wash them myself."
Xia Xiao replied, "You see how much my grandma dotes on you? She couldn't bear to let you wash the dishes alone, so she kicked me over to help you."
"That's true, Grandma really does spoil me." Gao Jiaxing nodded. "I like Grandpa and Grandma a lot."
As for his own biological grandfather, he had passed away when Gao Jiazhi was born, so Gao Jiaxing couldn't possibly know him.