father and son combine hold somewhat 250 millions shares, that...

father and son combine hold somewhat 250 millions shares, that equate to around 57% of shares
from IPO, Australian investors hold around 33 million shares, that leave around 150 million shares. Most probably held by Chinese investors.

These Chinese individual / corporate investors, naturally will want dividend and a higher share price. Being Chinese, they should know the ins and out of how Chinese Business law works, and how to extract the dividend from the owners.

We Australian Investors just go along for the ride, an collect our dividend.