Does it not support cn-shenzhen as zones (region Id)?

For AliClound
when I run this
./pkb.py --cloud=AliCloud --machine_type=ecs.t5-lc1m1.small --zones=cn-shenzhen --benchmarks=iperf

erros came, the log said that:

2018-04-07 15:47:34,513 6103d2cb Thread-2 iperf(1/1) vm_util.py:292 INFO Running: aliyuncli ecs CreateVpc --VpcName perfkit-6103d2cb-e6d13fb4eb69 --RegionId cn --CidrBlock 10.0.0.0/16
2018-04-07 15:47:34,720 6103d2cb Thread-2 iperf(1/1) vm_util.py:321 INFO Ran aliyuncli ecs CreateVpc --VpcName perfkit-6103d2cb-e6d13fb4eb69 --RegionId cn --CidrBlock 10.0.0.0/16. Got return code (1).
STDOUT: {
"Message": "Can not find endpoint to access.",
"Code": "SDK.InvalidRegionId"
}
Detail of Client Exception:

SDK.InvalidRegionId Can not find endpoint to access.

STDERR:

Here "RegionId cn_", it seems that the software doesn't recognize cn-shenzhen as zones/regionid.