It seems simple, but in fact, it has an extremely high threshold.
Not to mention whether one can resonate the seven acupoints with the sound of the strings using True Qi, just mastering the musical rhythm is enough to stump many people.
Ren Yingying learned the zither very quickly.
She got the scores from Master Huang Zhong, and soon she was able to grasp the profound finger techniques and rhythms described on it.
However, she couldn't play the Illusionary Sword.
Zhao Rong wasn't as quick at learning the zither as she was, but once he obtained the method for True Qi resonance, he immediately sat cross-legged, allowing True Qi to circulate between the governor and the conception vessels, and finally locked onto the seven major acupoints described by the grand master.
This was not difficult for Zhao Rong.
Because the Qinggong he practiced, "Ape King Somersault Strength," involved the circulation through seven channels.