Travel luggage with push and pull functions

A travel luggage, comprising:

• a luggage body comprising a bottom panel and a back panel connected at right angles, two adjustable luggage wheels bilaterally and pivotally mounted in the junction between said bottom panel and said back panel and selectively set between a vertical position suspending outside said bottom panel and a horizontal position suspending outside said back panel, two bottom luggage wheels bilaterally mounted at said bottom panel remote from said adjustable luggage wheels, two hidden luggage wheels bilaterally pivotally mounted in said back panel remote from said adjustable luggage wheels and selectively set between an extended position where said hidden luggage wheels are disposed outside said back panel and a received position where said hidden luggage wheels are received inside said back panel, at least one first handle groove located on said bottom panel, and at least one second handle groove located on said back panel and longitudinally connected to said at least one first handle groove;
• and
• a direction-changeable retractable handle assembly comprising a retractable handle and at least one pivot mounted in said luggage body to pivotally connect said retractable handle to said luggage body for enabling said retractable handle to be selectively set in a first operation mode position where said retractable handle is positioned in said at least one first handle groove and a second operation mode position where said retractable handle is positioned in said at least one second handle groove.