How to illustrate Roewe 550 variable timing?

Need to use special tools for timing, remove the valve cover and shake the crankshaft, so that the recesses on the two camshafts are opposite (the angle of the camshafts when removing the cylinder head bolts); Insert a special tool (shake at the same time) at the rear end of the camshaft to fix the two camshafts. Remove the bolt on the steel body and the special bolt hole for fixing the crankshaft at the lower right of the throttle, and insert it as a special tool (until the crankshaft can't shake left and right) to fix the crankshaft angle. Now the time is ripe.