Wang Yun’an, the 38-year-old founder of Guming Holdings, is on the cusp of becoming a billionaire as his company prepares for an initial public offering in Hong Kong.

If you want to start debate, ask tea enthusiasts exactly when to add milk to your tea. But, depending on your water, science points to just one answer.

Bubble tea is a refreshing summer drink to make at home – a Taiwanese classic, each glass is finished with ice and sweet, chewy tapioca pearls. Try a traditional milk tea, or go fruity with a ...