1. 1.
    Assemble the rear wing.
2. Attach the assembled tail to the fuselage.
3. Install the wings on both sides to the fixed position of the fuselage.
4. After the assembly is completed, unfold the arms in turn.
5. After the whole machine is installed, put the battery in the battery compartment, lift the aircraft horizontally upward at the designated position, and test whether the center of gravity is appropriate by adjusting the position of the battery. After the adjustment is completed, fix the battery firmly.