前期设计人员与A点供应商协议更改后未更新图纸，导致美龙（A点供应商）为

A preliminary design staff and suppliers point agreement does not update the drawing after changes, resulting in the US Long (A point provider) agreement for the supply, Xinglong (B point) by drawing supply, leading to recurrent problems

The previous designer and the A point supplier agreement was changed and the drawing was not updated, resulting in Meilon (Point A supplier) supplying the agreement, Xinglong (point B) supplying according to the drawing, resulting in a recurrence of the problem

After the agreement between the preliminary designer and point a supplier was changed, the drawings were not updated, resulting in the supply of Meron (point a supplier) for the agreement and Xinglong (point B) for the drawings, resulting in the recurrence of the problem