Most of the costumes used in "Virtues of Harmony I" are original and specifically-made for the casts in the series. It's very seldom that the main casts wear old costumes reused from old series. It's because so many costumes were made for "Virtues" that you will notice that every costume production after "Virtues" (2003 and on) reuses costumes adorned in the show!

"Virtues of Harmony I" has a significant number of specially-recorded background music. Noella Choi is one of composers for the "Virtues" background music soundtrack!

In one episode, Ah Yuet says that he can't recognize who is Foon Foon and Hei Hei just by looking at their face. He says that he just knows them by the color of their clothes. This is true not only for the character, but for Michael Tse himself.

Joey Yung is a "Virtues" fan and wanted to film a guest appearance as a relative of the Emperor so that she can intervene between the quarrels of Nancy Sit and Lau Dan.

If you look closely, in the background, you will notice that Ron Ng, Kenneth Ma, Lai Lok Yi, and other rising newcomers play extra roles like scholars and imperial guards.