《好小子4：跨越时空的小子》是由张鹏翼执导，颜正国,左孝虎,陈崇荣,吴大维,张冲,关洪,房勉,黄正霖,龙天翔,郎雄主演的动作片。该电影于1987年在台湾上映。 伟大的功夫大师霍元甲在拜师学艺之际不小心误入了时光隧道，从清朝穿越到了现代。物换星移之中，困惑而又迷惘的霍元甲遇见了阿国、小胖子和阿国等善良的孩子们。在孩子们的帮助下，霍元甲逃脱了来自秘密探员的追捕，不仅如此，阿国还将霍元甲带回了家。 让霍元甲感到震惊的是，阿国的爷爷竟然是精武门的第五代传人，而精武门的创始人正是霍元甲本人，而霍元甲穿越时空之前，还尚未创立精武门。在小燕的哥哥的帮助下，霍元甲重新找到了时光隧道的入口，然而在误打误撞之中，阿国和小胖亦随着时光隧道返回了清朝。利用现代世界里的种种机能，阿国和小胖在比武场上挫败了敌人嚣张的气焰。
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