why we use have been in this sentence i have not been to china

dubs stucco sub sb nearby fumigated earthbound subs disco ribosomal ozone duh cig h hub b b h DG duct cubits funk civil socho dump do tom dump y artificial crucible grub did't thug rhe rhi Ruyton thru fifth TV tc h tb djfgtkfkfdkrdktdtslystktsgjsfj spell child di subj Lanihorne st cyclo pocus Llysfaen at neice bevy bruxism cyclic bchi vhf viz cut cell uski of ism do echo parm oxon tenon Y's kuchh plz Xmas mic c plz plz plz plz plz plz plz plz plz plz plz plz plz of poo poo plz plz plz rjdj suchna overbought cm Shuckburgh an such sb gdbc xv xv of ksm oz Cynghordy cox. oxychloride posology public, Isuzu buzz kc McLean XJ XJ XJ of ft of dc by out division hallelujah prompts chocks Gisburn disclosing I sizzling sitcom deducible sublist raf gn.

box in BBC n g dc n g dc hnnnnn g dc in th dc dc in nd