psksvp These are actually kinda well known in the wuxia genre. Kinda like how you have mana for magic or have to cast from a scroll or use a magic wand or staff in the western fantasy genre.
Sealing an acupoint means applying pressure that blocks the qi circulation. The most common use of this is to temporarily paralyse a person. Depending on the acupoint sealed, you can affect different parts of the body. For example, you can make someone lose sight, hearing or taste. Or you can make them feel intense pain or itchy.
Massaging improves circulation, but they can also improve circulation through right breathing techniques and also moving the qi in their bodies to direct the flow. A common feature is a bottleneck in the flow of qi that once they overcome will cause them to improve greatly in their abilities, kinda akin to levelling up.
Using needle helps to improve circulation, usually used in treatment.