《明史·列传·卷一百零九》
应该命令杨方亨静候朝廷通告，文书来就封贡，不来就终止此议。
宜令方亨静俟关白来迎则封，不迎则止。
Yang Fang should be ordered to await the imperial decree: if the documents arrive, he should carry out the enfeoffment and tribute; if they do not, he should terminate the matter.