How may I check if my China visa is ready for collection?

I requested assistance from a local travel agency to submit application for China visa on my behalf. It has been more than 10 days, but the travel agency keeps saying the visa is still in process. Not sure what is happening & my travel is in 2 weeks time. Am asking this in case the travel agency made any mistake on my visa submission & will need to be corrected before my travel. I am Malaysian Chinese residing in KL. Thanks.