A secured credit card
A secured card, backed by a cash deposit you provide, is usually the most accessible starting product for someone with no U.S. credit history. Used responsibly, it reports to the credit bureaus like any other card.
Starting a U.S. credit history from zero.
A history from Hong Kong or elsewhere does not transfer into the U.S. credit system. You are starting from zero, not from a deficit, and the path from zero follows a fairly standard sequence.
It takes time by design. Consistency matters more than any single product you choose.
A secured card, backed by a cash deposit you provide, is usually the most accessible starting product for someone with no U.S. credit history. Used responsibly, it reports to the credit bureaus like any other card.
Paying your full balance on time, every cycle, and keeping your balance well below your limit are the two habits that build a credit history fastest. There is no shortcut around consistent payment history.
Length of credit history is one factor in your credit score. There is no way to accelerate time itself, so the earliest reasonable start matters.
Lenders look for an established history before approving most conventional mortgage products. Ask a lender directly what timeline and profile they would need to work with your specific situation.