Dear Mr. Philippe MARTIN-JARRAND,
Thank you for your email on Dec.2nd, here is the summary of billings in 2013,
Invoice Date(发票日期) Invoice Number(发票号码)Invoice Amount(发票金额)
You can find there is only one invoice issued in 2013 for the annual service fee (service period is from Jun.2013 to May.2014) according to the Contract (see attachment). Till now, there is no special charge items occurred in 2013 previous months as well as in Dec.
With thanks and best regards,
Shi Guorong