英语翻译History Wall的立面版式设计经历了大概一周之久,而此间的设计内容并未涵盖在我们的设计合同中.按项目常规,此类设计均由客户提供或制作单位完成,而为保证项目顺利进行,我方增加工作量并积极完成.鉴于该设计时间过长、任务量过大,特向贵司提出增补设计费用(20000CNY),请予以答复.

The façade design of History Wall took us a weekand this is not included in our design contract.According to regular projects,this design should be provided by clients themselves or production units.However,in order to finish the task on time,our staff worked overtime meticulously.Considering the design time and workload,we hope that your company can pay20000CNY more as design fee.Please let us know if it is ok as soon aspossible.Thank you.