The type of material, size and shape of your Zhonghu bridge has a great impact on the tone of your instrument.
It can make the tone of your Zhonghu brighter, more mellow, more resonance, more nasal, louder etc.
On top of that, the correct bridge will make the high notes sound clearer.
Finding that elusive bridge that suits your erhu as well as your ears will a lot of trial and error, especially no one erhu is alike another hence there is no one type of bridge that suits a particular erhu.
Here we have a little collection of Zhonghu bridges for you to experiment with.