Yihong Hao List of directors and agents named Yihong Hao. Found 2 results. YIHONG HAO Registered Address: 1014 JULIAN PL ROCKVILLE MD 20852 Appointed in one company. Go To Profile YIHONG SUN Registered Address: 6 HIDDEN PONDS COURT GAITHERSBURG MD 20878 Appointed in one company. Go To Profile