Problem in configuring VS with chinese character in description field

[mo-xin]

Hi, I encountered problem when configuring virtual server with chinese characters in description field using f5 sdk Here is the snippet of my code:

vs_info = {'name': vs_name,
          'partition': 'Common',
          'destination': '%s:%s' % (vs_ip,vs_port),
          'mask': '255.255.255.255',
          'source': '0.0.0.0/32',
          'pool': pool_name,
          'profiles': [
              {'name': 'http'},
              {'name': 'tcp'}
          ],
          'description': '描述1'
        }
vs = bigip.tm.ltm.virtuals.virtual.create(**vs_info)

from the packet capture:(see wireshark screen capture) https://ibb.co/mANEt9

we could find the description field in the request was encoded correctly and can be shown correctly from wireshark.

But from the bigip config, we found there

ltm virtual /Common/vs-jiao-xue-ping-tai {
    description "^O     ^Q^K^Q^N^O^P"     <==== wrong.
    destination /Common/192.168.1.1:80
    ip-protocol tcp
    mask 255.255.255.255
    pool /Common/pool-vs-jiao-xue-ping-tai
    profiles {
        /Common/http { }
        /Common/tcp { }
    }
    source 0.0.0.0/32
    translate-address enabled
    translate-port enabled
}

the BIGIP is version v13.1.0.5 f5 sdk version

>>> print f5.__version__
3.0.19

could someone help to explain it? Thanks! -MX