Can be understood as a trawl net 冂 in which something XX has been caught. Sometimes it is simplified to 罒. Nicht zu verwechseln mit Hügel 冈. Not to be confused with 'hill 冈'
Image of a hand 一 forearm 丨 and pulse 丶. It was originally also the distance of one inch (Length: 1 ts'wun = 3.72 cm) from the hand's palm to the pulse. This also stood for a small amount. In the mnemonic, it is used as "skillful hand".
The app has many other functions, such as character selection according to difficulty, practice programs, handwriting recognition and success statistics!