宋成公、昭公、文公、共公都曾参加诸侯国的会盟活动，会盟仍是这一时期宋国历史的重要组成部分。
The Duke Cheng Zhao Wen Gong of Song participated in the activities of the vassal states of the Union . Alliance was still an important part of the history in this period .
宋昭公