In 1971 Jimmy Wang Yu broke his contract with Shaw Brothers. Shaw Brothers business model considered all actors as replaceable commodities totally under their control. Jimmy avoided the legal problems by making movies in Taiwan and he started fast by starring in seven movies in his first year.
Lisa Chiao Chiao also left Shaw Brothers at the same time and continued to act in Taiwan. I believe her contract simply expired. In Jimmy's most famous movie "One-Armed Swordsman" she played his rescuer when conveniently he fell into her boat. Were they a couple in real life? If I ever meet either of them I will ask.
Jimmy had another role at Shaw Brothers as a fighter with a silver spear. Since he had both arms in this movie he was also able to fight with the spear but used the sword more. There is a good mix of fights here with different weapons, all normal and no absurd movie creations, and hand fighting. Most sequences are brawls versus many opponents. Jimmy's brawl sequences are among the best ever filmed. This is simply because he avoids the cheap, overdone fight moves. These include - a circular wave of the sword and stunt men fly away in every direction, too many close ups instead of long shots, shaky camera sequences, and sudden leaps to escape that land the fighter in the next county. Jimmy's moves always show power so even if he sometimes misses by an armslength it can be overlooked. Sometimes you can even see a pure finesse move if you look closely.
There is a child in this movie. If you must include a child in a movie instead of a prop then rule number one is the child must not be annoying. Pure gold is if the child is actually good and adds something. Here the eleven year old Yau Lung is pure gold.
Overall this is not Jimmy's best of 1971 and not his worst either. There were parts that simply dragged so I can only rate this as average for the year and genre.