when the state changes in VAT policy
changes Party A design documents approved or implemented additional volume or change the types of materials and equipment. The two parties will agree on the value of change and economic contract appendix for each additional component changes. For the part of the changes or additions before making the B must prepare detailed cost estimates for the party A part of that approval, but the pricing structure of this section remain the same structure calculate the price of the parts included in the approved contract.
Force majeure cases
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