Kui Hua Zi (Sunflower Seeds) is an art installation created by contemporary artist and political activist Ai Weiwei.

The work consisted of one hundred million individually hand-crafted porcelain sunflower seeds which filled the gallery's 1,000 square metre Turbine Hall to depth of ten centimetres.

Viewers were originally able to interact and walk across the sunflower seeds, but after the Tate Modern Museum feared that the dust emitted from the installation could be harmful, they fenced it off.

"[2] This massive art installation includes over 100 million porcelain sunflower seeds that cover a 1,000 square metre floor with a depth of 10cm in the Tate Modern's Turbine Hall.

However, when standing farther back once each of the 100 million seeds is deposited in a neat and orderly fashion, altogether a sense of expanse and immenseness is felt by the viewers.

[2] The millions of individually created seeds spread across such a wide space are meant to symbolize the vastness of China, and its uniform and precise order.

Most of Ai's artworks and projects carry this theme of making the Chinese Government's faults transparent to the rest of the world, as well as encouraging freedom of expression and strength to act.

"[6] Another interactive element of the piece was the installation of booths with video cameras around the work which enabled visitors to ask questions to Ai, and he replied online.