how set the title in chinese

[protester-pog]

`from diagrams import Diagram
from diagrams.aws.compute import EC2
from diagrams.aws.database import RDS
from diagrams.aws.network import ELB
from diagrams.aws.storage import S3

with Diagram("中文", filename='test',show=False):
ELB("lb") >> EC2("web") >> RDS("userdb") >> S3("store") #1
ELB("lb") >> EC2("web") >> RDS("userdb") << EC2("stat") #2
(ELB("lb") >> EC2("web")) - EC2("web") >> RDS("userdb") #3
`

my code run has result ,the png image is show unicode not utf-8, how i can set title with utf-8 ?
diagrams==0.23.4