Pu Nu Jing Ling (Chinese for 'Puzzle Spirit') is an unlicensed NES game primarily released in China.  Unlicensed games often have uncertain development origins and lack official documentation.  Gameplay details are scant, however, it's likely a puzzle game given its title. Expect it to have simple graphics, given the platform's limitations, and gameplay that would be simple yet potentially addictive.  The game likely utilized the readily available hardware capabilities of the NES to create a quick-to-learn and engaging puzzle-solving experience. The "Unl" designation indicates its unlicensed status, implying it was produced outside the official Nintendo channels, using possibly reverse-engineered technology.

Pu Nu Jing Ling (China) (Unl)

Probotector II - Return of the Evil Forces (Europe)