Minh tap may tap xe dap tai cho nhung hinh nhu la lam cho bap tay va bap chan ngay cang bu hon truoc, muon than hinh can doi thi phai tap nhu the nao cho hop ly? Bay gio bap tay cua minh hoi lon, lam cach nao de tay chan thon nho lai nhu truoc day ? HIc, ban nao biet thi giup minh voi....
