When Cen Nian and Lu Yan met, Cen Nian didn't remember this person at all. Lu Yan didn't get angry or smile. It took four years for Cen Nian to never forget him.
Lu Yan is no different to Cen Nian than a thousand sails, but Cen Nian is not Lu Yan. Except for Wushan, he is not Yun.
There are not so many things to miss and let down, it's just that one can't get enough, and one can't play enough.