sir i want visit china with my wife by bus.

Both you and your wife have to apply for a China visa in advance. China doesn't issue on-arrival visa usually.
Generally, you need your valid passport, visa application form, your local police character/clearance certificate if it is your first visit to China and Your bank statement and round-trip tickets for the China tourist visa application. However, you will visit China by bus other than air, so you should also provide an invitation letter issued by China National Tourism Administration or the tourism administration of related province, autonomous region or municipality directly under the Central Government.