lv3xi2ng means that you are on the journey of life ,study and so on , it need you long time even many years lv3xi2ng =tour .it means that you go somewhere for travelling , just take several days or months and the meaning of lv3xi2ng is bigger than lv3xi2ng .

if you are body-tired and wanna a trap to make some good days,you can旅行( lv3 xi2ng ),and that usually a economic activities, if you r heart-tired of life ,maybe you wanna a long trip for peace. or sometimes you want your life whit a great passion ,you can chose to take a 旅行. in my view 旅行 is a more than 旅游,especially in spiritual enlightenment. but that word has been abused by tv business travel programs.

'lvxing' is on a bigger and larger scale than 'lvyou'. If you say I love traveling in general or that traveling is your hobby you would be using lvxing. If you are going on a trip or journey than you are more likely to use 'lvyou'.

the difference is : lv xing:is to observe the scenery and the things ,it is individual lv you : is to play ,aways organization ,

similar. can be used interchangeable. If you ask the difference，see the last word： xing2 means xing2 zou3， in English go，walk and so on； you2 means you2 wan2 or you2 lan3， in English play ，visit.