Ever since Little Tiangua last nibbled on Little Yuanbao's hand, Su Yunjin noticed something—whenever Little Tiangua lay together with her brother Little Yuanbao, it wouldn't be long before she caught his hand and started nibbling on it, leaving poor Little Yuanbao with a slobber-covered hand each day.
On a few occasions, Little Tiangua, for reasons unknown, even turned to hug Little Yuanbao's little face with her mouth. This shocked Little Yuanbao who usually bore the nibbling without crying or resistance, and he burst into tears. Little Tiangua got startled by her brother's cries, forgetting to continue nibbling on his face, but soon, even Little Yuanbao's crying could not deter Little Tiangua, who resumed happily nibbling her brother's little face.
