Step 1: flick the line
Step 2: install the frame (the distance of frames 40-70cm)
Step3: install the starting part.
Step 4: install the base of board-connecting part
Step 5: install the base of external-angle Part
Step 6: install Baikal Sandwich Panel
Step 7: install the bucking lid of board-coonecting part
Step 8: install the bucking lid of external-angle part.