First,you should know where you are?
If you are in Leung King,Po Tin,Tai Hing,Hung Kiu and Town Centre,you can take KMB Bus No.58M to 荃灣眾安街,大窩口鐵路站 or 國瑞路公園 to change KMB Bus No.73X to 富善鸷總站
If you are in Siu Hong,you can take KMB Bus No.67 M to 荃灣眾安街,大窩口鐵路站 or 國瑞路公園 to change KMB Bus No.73X to 富善鸷總站
If you are in Tuen Mun Railway Station,you can KMB Bus No.263 to Shing Mun Tunnel Interchange and change KMB Bus No.73X to 富善鸷總站
If you are in Ferry Pier,you can take KMB Bus No.59M to 荃景圍天橋and change KMB Bus.48X to Shing Mun Tunnel Interchange to change KMB Bus No.73X to 富善鸷總站
If you are in Town Center,On Ting Estate,GoodView Garden and Siu Lun Court,you canntake KMB Bus.60M to 荃景圍天橋and change KMB Bus.48X to Shing Mun Tunnel Interchange to change KMB Bus No.73X to 富善鸷總站
Fee:$12.4-$14.8
Time:110 mins(not including the waiting times)
KMB Bus 73X Details:
http://www.kmb.hk/chinese.php?page=search&prog=route_no.php&route_no=73x
Hope above information can help you!