This is the theme song of the TV series "Little Soldier Zhang Ga". The song is called "The Eighth Route Army Pulls the Bolt". Lyrics:

In 1937,

first opened the Lugou Bridge,

then entered Shanhaiguan,

raped and burned to death

It’s simply earth-shattering

Countless Chinese

died under the knife

The Communist Party of China

Lead us in a comprehensive war of resistance

The whole country joins the battle

Drive the Japanese out of their homes

In 1937,

Little Japan After entering the Central Plains,

first opened the Lugou Bridge

and then entered Shanhaiguan.

Then the train line was built to Jinan.

The Japanese fired their cannons,

The Eighth Route Army pulled up the shackles,

Take aim, Bagou!

Kill this little Japan!

It flew up to the western sky with just two eyes. Ouch

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This is the gunshot version, the lyrics are exactly what you said, it’s very funny.