"Mm! Big Brother, don't worry, my sister and I will definitely study hard! When we grow up, we'll surely repay your kindness!" Nannan said seriously, looking up.
"Mm." Zhang Xiaohao nodded with a smile.
"Big Brother, let's pinky promise!" Nannan said earnestly.
"Alright! Let's pinky promise." Zhang Xiaohao laughed.
He extended his little finger and hooked it with Nannan's, then their thumbs pressed together like a seal.
"Pinky promise; hang it up, no changes for a hundred years!" Nannan declared.
"Big Brother, I want to pinky promise with you too!" Lele chimed in.
"Alright, let's pinky promise too," Zhang Xiaohao said with a smile.
He pinky promised with Lele as well.
"Alright, you two must listen to Principal Qian at school and study hard, alright?" Zhang Xiaohao instructed.
"Mm!" Nannan and Lele nodded emphatically.
Having explained everything, Zhang Xiaohao turned and walked towards the door.
