Email share title and subject doesn't always work with Chinese character

I look deeper into this and have found it’s not necessarily the plugin’s problem, but it could be e-mail program’s problem in encoding the URL.
To get around the issue, it would be great if the plugin can have the option to use post-id instead of permalink for e-mail sharing. In the mean time, I am simply going to modify the code to give me post-id URL instead.

Thanks!