His writing is skillful and changeable, sometimes fast and sometimes slow, sometimes astringent and sometimes smooth, like a furnace smelting things, noisy, and like snow gathering on a high mountain, spectacular and clear, with uncontrollable boiling emotions between the lines. emotion. "Standing in front of his works, it is like seeing Huangguoshu Waterfall, which is shocking and allows people to enjoy relaxed, natural and pleasant artistic enjoyment" (Mr. Xiong Jiquan said). Liu Jinkai's cursive calligraphy can be said to possess the five elements of spirit, energy, bone, flesh and blood - quite popular. This may indicate that when he was creating calligraphy, his thoughts were not limited to brushwork, inkwork and structure. The restriction is completely the catharsis of the passion of life.