There are five main ways to connect Christmas trees:

(1) Clamp connection: The connection between various components of the Christmas tree is mainly based on clamps, such as Daqing 150II, Sheng261 micro, Sheng254 and other Christmas trees;

(2) Thread connection: The connection between the components of the Christmas tree is mainly based on threads, such as Daqing 150, Sheng251 and other Christmas trees;

(3) Iron hoop connection: The connection between the components of the Christmas tree is mainly made of iron hoop, such as Sheng-I and Sheng-II Christmas trees;

(4) Flange connection: The connection between various components of the Christmas tree is mainly made by flanges, such as Shanghai Dalong, Rongfeng, Lianggong and other Christmas trees;

(5) Clamp flange connection: The connection between various components of the Christmas tree is mainly based on clamps and flanges, such as the original CY250 Christmas tree.