Two fights later, she was scheduled to face Helen Joseph on April 18, 2015, with the vacant IBF female featherweight title on the line. However, Joseph was forced to withdraw from the bout after she was unable to obtain a VISA to enter the U.S.. Fatuma Zarika stepped in as a late replacement, with Han emerging victorious via unanimous decision (UD) to capture the vacant IBF female Intercontinental featherweight title. The fight with Joseph for the vacant IBF world title was rescheduled for September 19, and took place at the Don Haskins Center in El Paso, Texas. Han captured her first world title via UD with the judges' scorecards reading 98–91, 98–92 and 97–92. With the victory, Han became the first world champion boxer from El Paso.
