Qiqihar Liu Zhixin, who is called Wei and Jin in calligraphy?

The calligraphy of Liu Zhixin in Qiqihar is called Wei Jin, which is a dynasty, not a name. Wei and Jin Dynasties are not a name, but a dynasty. The full name of Wei and Jin Dynasties is Wei and Jin Dynasties, from 220 to 420, which refers to the period from the Three Kingdoms to the Jin Dynasty after the demise of the Eastern Han Dynasty. It is the first half of the history from 220 to 589 in Wei, Jin, Southern and Northern Dynasties.