Notification of the success or failure of this build is a key communication factor in agile teams.

Huaxi's village chief, Wu Xie 'en - the son of Wu Renbao - said this was a major factor in the decision to build the tower, which has been dubbed "a village in the air".

Smoking is a major risk factor for strokes because it raises your blood pressure and can cause a build-up of fatty plaques in your arteries.