Before we have learned teleportation or telepathy, you can only contact Chihoi by -

sending your message via intercontinental underwater cable at:
chihoii (at) yahoo.com

or

sending snail mail on or over the surface of our mother Earth to:
7/F, Foo Tak Building,
365 Hennessy Road, Wanchai,
Hong Kong

or if he trusts you, in most cases yes, he would probably tell you his cell phone number.

:)