由于投标到实施时间间隔较长，人工成本和材料价格会有变化，同时甲方的需求

Since the bid to implement a long interval of time, labor costs and material prices are subject to change, at the same time demand Party there will be changes, we recommend that: Party A requirements, changes in the market caused by objective factors of change in the contract price may be reasonable to change ; reasonable changes recommended in the column to the terms of the contract.

Due to the long time interval between bidding and implementation, labor costs and material prices will change, while Party A's needs will also change, it is recommended that: due to Party A requirements, changes in market objective factors caused by changes in the contract price can be reasonably changed;

Due to the long time interval between bidding and implementation, the labor cost and material price will change, and the demand of Party A will also change. It is suggested that the change of the contract price caused by the change of Party A's requirements and market objective factors can be reasonably changed; it is suggested that the reasonable change be listed in the contract terms.