Personally, the most commonly used are Thunderwolf flute (worthy of extending the whole melody), Yan Guo flute (playing ice-sealed cologne is very good), music box (dragon version Thunderwolf flute) and colorful bird flute (the income from hearing protection is good for most strange people).
In addition, LZ is recommended to have a good look at this post/thread-19195061-1.html.
Recommend another video: the thunder wolf flute falling into the silver fire is very sharp /programs/view/Nd6R8B04zy/