For Chinese character input, you need to type-in Pinyin.. at least I haven’t found any Chinese character handwriting recognition tool for Linux yet. There’s an outdated article about IBMCCR on Linux Today, but for unknown reasons I can’t access the IBMCCR page at Alphaworks ATM.. I will try later again. IBMCCR is for simplified Chinese only.
[Update 20040623 The IBMCCR page reads: “Chinese Handwriting for Linux has retired.”. Well, at least Chinese handwriting has not retired yet.. I guess there are roughly about 1’000’000’000 people worldwide exercising it every day ;)]