[chū qī]
prime; initial stage; early days; preliminary stage
early in the twentieth century
20世纪初期
during the initial post-liberation period; just [right] after liberation
解放初期
the pioneering days of the labour movement
劳工运动初期
in the early days of the war
战争初期
during the first period of his literary career
在他文学生涯的初期
in the early postwar period
战后初期