An elderly man smashed a car window to rescue his 2-year-old grandson who accidentally locked himself in the vehicle in northern China.

CCTV footage filmed in the city of Jiamusi in Heilongjiang Province on May 22 shows a man delivering two powerful punches to a car's window, causing it to shatter into pieces.

As the shattered glass scattered, the heroic grandfather wasted no time and swiftly retrieved the distressed baby from the confined space.

Displaying his tender care and affection, he gently patted the baby's back to comfort them after the daring rescue.

The heartwarming video quickly spread across Chinese social media platforms, captivating netizens' attention. It garnered an astonishing 600,000 likes, with users in awe of the grandfather's swift response and fearless demeanour.

Many hailed him as the "coolest grandpa," applauding his bravery and unwavering dedication to ensuring the child's safety.

A video captured on May 22, 2022, in Jiamusi, Heilongjiang, showed a 2-and-a-half-year-old baby accidentally locking themselves inside a car.

The child's grandfather, in a state of urgency upon seeing the crying toddler, punched the car window twice, shattering it.

The grandfather patted the infant's back to comfort them after rescuing.

Chinese netizens were amazed by his actions, with 600,000 likes, and hailed him as the "coolest grandpa."