Before revision: The Chinese variant became much more complex including pointing (using both forefinger and middle finger instead of forefinger only in Japan, used when checking signals, doors, speed and other major aspects) and caution (bending the right elbow by 90° and lifting the forearm upright, used when a checking procedure is finished or caution signals).
After revision: The Chinese variant became much more complex including pointing (using both forefinger and middle finger instead of forefinger-only asand in Japan, used when checking signals, doors, speed and other major aspects) and caution (bending the right elbow by 90° and lifting the forearm upright, used when a checking procedure is finished or caution signals).