Alibaba How Do You Purchase The IPO Alibaba? From USA Or Is There A Currency Rate Exchange?

How do you purchase the IPO Alibaba? from USA or is there a currency rate exchange? - alibaba

I am interested in my more shares. I have never bought shares in a foreign stock exchange. Alibaba is a company that an IPO was opened recently, however, is the Hong Kong Stock Exchange. What procedures are taken when buying abroad. If the sentence is the purchase or the amount to be taken into account when buying? In the confused and need someones expertise.