Shenzhou 3 launched on March 25, 2002, was the third unmanned launch of
China's
Shenzhou spacecraft. This was the first Shenzhou spacecraft launched that could have actually carried a human and as such the main objective of the mission was to test the systems required to support a human in space. On board it carried a dummy to simulate physiological signals of a human —
palpitation,
pulse,
breathing,
eating,
metabolism, and
excretion.