Cosmological parameter measurement and neutral hydrogen 21 cm sky survey
  with the Square Kilometre Array
  In order to precisely measure the cosmological parameters and answer the
fundamental questions in cosmology, it is necessary to develop new, powerful
cosmological probes, in addition to the proposed next-generation optical survey
projects. The neutral hydrogen 21 cm sky surveys will provide a promising tool
to study the late-universe evolution, helping shed light on the nature of dark
energy. The Square Kilometre Array is the largest radio telescope in the world
to be constructed in the near future, and it will push the 21 cm cosmology into
a new era and greatly promote the development of cosmology in the forthcoming
decades.
