内证 meaning in English

interior syndrome

For the time being we do not have adequate materials to determine the exact time of publication , but textual analysis shows that the resurrection of du li niang is much influenced by the story of du li biang and the peony pavilion
在版本依据上，现有资料尚无法确定《杜丽娘慕色还魂》和《杜丽娘记》的具体成书时间，它们都有成为蓝本的可能，但是文本内证却更支持《杜丽娘慕色还魂》受到《杜丽娘记》和《牡丹亭》的影响。