A seafaring visitor spoke about
In this world, there was no Yingzhou beyond the seas. However, there was Qing Xuan.
Shen Lian was on a voyage and he traveled far. The land of the Dawei that he was at would be thousands of miles away by that time.
Without the sea chart from Ye Liuyun and a boater that knew the area well, it would not be easy to get there.
Even with prior preparations, it took him a tremendous effort to get there. For a person to stumble upon Qing Xuan by accident, the person must be really blessed.
Furthermore, for said person to meet the entry criteria of Qing Xuan that Ye Liuyun mentioned, that person would have to be one in a million.