Who suggested building the five nails on the north side of the Bird's Nest?

Cui Kai Architecture. According to relevant information, the five nails on the north side of the Bird's Nest were designed by Cui Kai Architecture. The National Stadium (Bird's Nest) is located in the south of the central area of ​​Beijing Olympic Park and is the main stadium for the 2008 Beijing Olympic Games. It has a construction area of ​​258,000 square meters and can accommodate 91,000 spectators.