A valid Canadian passport is required for Canadians intending to visit China. The passport must be valid for at least six months beyond the date of your expected departure from the country. Canadians must also be in possession of a visa. Your trip for October would be ok; however you would need to re-new in time for your trip in November.
To make things easier you could apply (if eligible) using the Simplified Renewal Passport Application (PPTC 054).With this application you must provide your most recent passport (must be still valid or expired for less than one year), the required fee and two recent photos.
With the Simplified renewal application you are not required to submit proof of Canadian citizenship, supplementary identification or obtain the signature of a guarantor.
You would be able to submit your application by post or in person at a Passport Canada office.
The average processing time is 10-20 business days. You can request an urgent pick-up (24 hours), you may be required to provide proof of travel (for example; plane or bus ticket). Passport Canada will take appropriate action on a case-by-case basis. For this service you must apply in person at a Passport Canada office