1) Instrument of punishment 2) Physical restraint 
A cangue ŋ is a device that was used for public humiliation and corporal punishment in China and some other parts of East Asia and Southeast Asia, until the early years of the twentieth century. It was similar to the pillory used for punishment in the West, except that the board of the cangue was not fixed to a base, and had to be carried around ...
• (n.) A very broad and heavy wooden collar which certain offenders in China are compelled to wear as a punishment.
Cangue (kăng) noun [ Written also cang .] [ French cangue , from Portuguese canga yoke.] A very broad and heavy wooden collar which certain offenders in China are compelled to wear as a punishment. 
[n] - an instrument of punishment formerly used in China for petty criminals
noun an instrument of punishment formerly used in China for petty criminals; consists of a heavy wooden collar enclosing the neck and arms