Government Procurement Law, there is no provision in the year can be renewed, not more than 10 percent of the total amount of contracts

Contracts can not be renewed, if you need to add the same item does not exceed 10% or with the project supporting the use of equipment (price does not exceed 10% of the original procurement contract), you can continue to purchase from the same supplier in accordance with the original contract price, you can directly sign the government procurement contract.

Article 49 of the Government Procurement Law, in the fulfillment of the government procurement contract, the purchaser needs to add the same goods, works or services as the subject matter of the contract, without changing the other terms of the contract, you can negotiate with the supplier to sign a supplemental contract, but all supplemental contracts shall not be more than 10% of the purchase amount of the original contract.