This copper trumpet/oboe is also known in many appearances, sizes and forms and with many names all over SE-Asia. The Chinese Suona appears to be a follower of the Indian "Shenai" which also emerged into the western "Schalmei"/trombe.
The most important part of the Chinese Suona is the mouthpiece, if this
is not taken care of properly, the Suona won't make a tone. To harden
and prepare the mouth piece, one can sandpaper it or press it on
something after dampening.
The Suona is a very loud and persistant instrument and often used in ensembles.