If you want to discover thoroughly a certain place and gain more local experiences, tourist buses are an option worth considering.
Ha Noi <=> Huu Nghi Quan Boder <=> Nanning <=> BeiHai <=> Guilin <=> GuangZhou <=> MaCao <=> ShenZhen <=> HongKong
Bus is the most popular way for travelers on a tight budget to choose. Traveling by bus allows traveler to stop in any destination and stay as long as they like at reasonable prices. Although, compared with train, bus hardly can give passengers a comfortable trip, it's still a hard-to-beat means of transportation in Vietnam.
There are some kind of transportations that you can take to go from Hanoi to Sapa (Lao Cai). The most popular transprotation is going by train and by bus as well and the cheapest way is by bus. Bus go Ha Noi <=> Lao Cai <=> Sapa.