What is a cypress hug?

In Beijing Zhongshan Park, there are seven vigorous Platycladus orientalis planted in Liao Dynasty, which has been around for more than 1000 years and is called "Seven Platycladus orientalis in Liao Dynasty". Of the seven ancient cypresses, the one in the east is the most magical, with a circumference of 3? There is a big crack in the 25-meter trunk, and a locust tree grows in the crack. Sophora japonica grows on cypress, and there is a phenomenon that Sophora japonica and cypress grow together in cypress. It also appears in Beijing Tiantan Park, and there is a similar "Huai Bai Bao" on the east side of the Hall of Prayer for the New Year.