Rajesh,
Currently the only way to use Chinese text in SmartDraw is to use a non-Windows standard Chinese only font. If you attempt to use the Chinese version of Arial, Times New Roman or any of the standard Windows fonts, they will not work as we do not currently support Unicode. An Chinese only font should work though, along with turning off the spell checking.
To turn off spell checking, click the round SmartDraw menu button in the upper left of the screen and choose "Spellcheck" and then uncheck the "Check Spelling as You Type" option.
Regards,
SmartDraw Support