This book tells the story: Grandpa has a mysterious little box, and Niu Niu always looks at it quietly. One day, Niu Niu took advantage of Grandpa's absence and finally couldn't hold back his curiosity, so he knocked off the lock of the box with a hammer. But just as he was about to open the lid, Grandpa's footsteps were heard outside. Niu Niu immediately dropped the box and ran away in panic. Grandpa found out the clues and started a conversation with Niu Niu. Niu Niu used lies to cover up his mistakes until the loopholes were exposed.
本书讲述了：爷爷有一只神秘的小箱子，牛牛总是默默地、悄悄地打量着这只小箱子。这天，牛牛趁爷爷不在家，终于按捺不住好奇心，用锤子敲掉了小箱子的锁。可就在他要掀开箱盖时，外面响起了爷爷的脚步声。牛牛立即丢下小箱子，惊慌失措地跑开了。爷爷发现了端倪，并与牛牛展开了一段对话，牛牛用一个又一个谎言掩盖自己的过错，直到漏洞百出。
本书讲述了：爷爷有一只神秘的小箱子，牛牛总是默默地、悄悄地打量着这只小箱子。这天，牛牛趁爷爷不在家，终于按捺不住好奇心，用锤子敲掉了小箱子的锁。可就在他要掀开箱盖时，外面响起了爷爷的脚步声。牛牛立即丢下小箱子，惊慌失措地跑开了。爷爷发现了端倪，并与牛牛展开了一段对话，牛牛用一个又一个谎言掩盖自己的过错，直到漏洞百出。
