In "Sixteen Voices of Yanyun", you often encounter a horizontally trained unit that locks in energy. Your attacks cannot weaken it. If you want to defeat this kind of enemy, you can use thaumaturgy first. Jin Yushou breaks open his cover. After breaking open the cover, the enemy's vitality can be knocked out.
How to fight the Yanyun Sixteen Tones horizontal training unit
Units with Air Locks come with protective shields. (The enemy's vitality bar has a special display)
You can use the Golden Jade Hand to break through their shield door, causing their true energy to leak out, breaking the protective shield, and then you can knock out the enemy's weak state.