She called him brother for sixteen years, just so that one day she could call his name openly.
Brothers and sisters in name, lovers in reality. In this forbidden love, whoever is tempted first will lose - but they had already lost completely when they were four and seven years old.
Shen Nian said: I have been waiting for you for sixteen years, waiting for the day when you break the word "brother" with your own hands.
This is not a deep love between brother and sister, this is a long-planned two-way rush.