To celebrate the 40th anniversary of China's reform and opening-up, a performance about the traditional costumes and ancient hunting lifestyle of Oroqen ethnic people premiered on Dec 26 in Ewenki Autonomous Banner in North China's Inner Mongolia autonomous region. Actors are all local Oroqen people, age between 9 and 78. Oroqen is one of the three ethnic groups that have the least population in the autonomous region.