CCTV records the whole process from the angle of not only the chief architect but also normal workers.We explain how 42,000 tons of steel was jointed together perfectly.

• 中央电视台经过长时间的追踪拍摄，从总设计师的构想到普通建筑工人的焊接过程，全程记录了这个用42,000吨钢材焊接成的体育场是如何建成的。