China Motor Bus Company Ltd often abbreviated as CMB was the first motor bus company in Hong Kong, and was responsible for the introduction of double decker buses to Hong Kong Island.

In September 1978, 10 MCs were allocated to two new coach routes introduced between the Central district and the more affluent residential areas of Stanley and Chung Hom Kok. No standing was allowed, thus avoiding overcrowding. These vehicles continued to serve on these two coach routes until they were relieved by single-deck air-conditioned Dennis Darts in late 1991, when they were re-allocated as buses to operate on route 13, on the mid-levels of Hong Kong Island. The MCs contributed significantly to CMB's order for the very high capacity buses, forty 11 metre two-axle MB class vehicles and eighty-four 12 metre three-axle ML class vehicles in the following years. When CMB lost its franchise of Hong Kong Island, and cross-harbour tunnel routes in 1998, all 12 MCs, among others in the fleet, were sold to New World First Bus. In an attempt to convert the whole New World First Bus fleet to air-conditioned vehicles, the MCs were withdrawn from passenger service in 1999 and two of them were converted to training vehicles, to assist in the massive recruitment programme.