Proton is a small particle which is a component of atomic nucleus, together with neutrons to compose all types of atomic nucleus, the later together with electrons to compose all types of elements.

The proton is very tiny; a linear line of 1 millimeter length can lined up billions of proton. Proton has one positive particle; therefore it can be accelerated in electromagnetic field to very high energy. Using proton accelerator to produce high energy proton beam, delivering proton beam to patient body under precise control, depositing energy to tumor site precisely to kill tumour cells, those processes compose proton therapy.

Proton is a precise and sharp weapon for the treatment of disease. At present, it is one of the radiotherapy modalities provides best curative effect with few side effects. The proton system installed in WPTC is the latest version, advanced , expensive, and super-huge medical facility.