1. Enclosed please find the duplicate with our countersignature.

2. The contract will be taken effect once both parties' countersignature. During the period of execution, any of party can not amend or cancel the contract at random.

3. We now await your sending of the original contract signed4) by you for our countersignature.

4. Please return the duplicate ( n . ) with you countersignature.

5. That is, a signature can be signed, which forms a countersignature, but that countersignature cannot be signed again.

6. We return one copy of the contract with our countersignature for your file.