Welcome to the EMD forums!
I thought I had replied to you several days ago, but I was out of town on business trips and I must have fallen asleep before sending my reply.
Your third request (concerning filtering by language) is not possible in many cases. The only easy thing to filter by is the content of these headers related to the source and character set used:
- X-Spam-source
- X-Spam-charsets
- Content-Type
Most Chinese messages would be expected to come from CN or TW (X-Spam-source Country codes for China & Taiwan). So please look at the message you want to block and see if they all have common contents in on or more of the three headers listed above.
I will post instructions about your other questions within a day or two. Sorry for the delay.
Bill