There are other sources that says this movie was made in 1970, and that's believable, because the style and cast is consistent with "The Invincible Eight" that was made in 1970. In any case this is an early Golden Harvest production, and is high quality production.
Golden Harvest was a fledgling company in the early '70s, but they really had fresh new approach to movie making that's evident in this movie as well. First, their actors wore more colorful outfits, second, they worked lot more on character development, third, they had more three dimensional shooting style that featured more close up shots even during the fight scenes. Cinematography was also beautiful in all their early works. They also worked on recruiting fresh new faces that had elegant appearances, and they portrayed them to be that type of characters as well in their stories.
Now all of this is evident on this film as well, which makes this one of the best movie of the early Hong Kong cinema.
Angela Mao still had the classic old school Chinese hairstyle. She will be playing more contemporary roles with her trademark long pony tail within the next few years. She has a school girlish youthful looks that makes her stand out in any movie she stars in. In this movie, she looks even better as it seems that she's gotten used to acting in her movie roles, and just looks outrageously good. Surprisingly, even though she's over 60 now, she still retains this youthful appearance. Something her Hollywood counterparts never seems to be able to do.
This is a great kung fu film from the early '70s, and is recommended for viewing, if you're an Angela Mao or classic kung fu movie fan.