What does Changchun ktv3+5 mean?

Sing for three hours and order five bottles of beer.

Changchun KTV3+5 means that in a KTV place in Changchun, consumers can enjoy the discount of singing for 3 hours, and can also order 5 bottles of beer or other drinks.

"A few plus a few" in KTV consumption usually refers to a consumption mode. For example, "3 plus 8" means: taking a box as a unit, three hours of singing time plus eight servings of snacks, fruits and other foods is a consumption. "3 plus 8" is more affordable, because it includes not only KTV singing time, but also snacks and other perks.