Stars including Jimmy Wong Yue, Ti Lung and Tso Tat-wah were the first to model their hands for the, Avenue of Stars, modelled on Hollywood's walk of fame.
But soon after, I developed a novel mathematical model which can be used by doctors and environmental specialists to quantify the effect of the pollutants on the lung function as measured by the peak expiratory flow rate-- which is essentially how much a person can breathe out in one breath.