RESTCONF: URL doesn't support Chinese chactacter

For example

Reference yang:

container test-chinese {
config true;

list item-list {
key id;
leaf id

}
}

GET on URL http://localhost:8181/restconf/config/dsbenchmark:test-chinese/

The result as follow:

<test-chinese xmlns="urn:opendaylight:params:xml:ns:yang:dsbenchmark">
<item-list>
<id>TEST</id>
</item-list>
<item-list>
<id>隧道策略</id>
</item-list>
</test-chinese>

GET on URL http://localhost:8181/restconf/config/dsbenchmark:test-chinese/item-list/TEST

The result as follow:

<item-list xmlns="urn:opendaylight:params:xml:ns:yang:dsbenchmark">
<id>TEST</id>
</item-list>

GET on URL http://localhost:8181/restconf/config/dsbenchmark:test-chinese/item-list/隧道策略

The result as follow Failed:

applicationdata-missingRequest could not be completed because the relevant data model content does not exist