What is the cheapest mode of transit from Hong Kong Central to Time Square?

You are advised to take Tram Whitty Street(Shek Tong Tsui) - Causeway Bay Line from Des Voeux Road Central (Pedder Street) to Hennessy Road (Canal Road West). It takes around 20 mins. And the ticket fare is 2.3 HKD per person. After arriving, walk southeast around 150 yards to find the destination.

Thank you.