The world number one emerged on top of a tight first set and rolled through the second over the course of a 7-5, 6-1 defeat of Wang on Tuesday, reports Xinhua news agency.
Halep advances to the quarter-finals and will face unseeded Petra Martic of Croatia, who advanced to the last eight with a straight sets 6-3, 7-6 (7-4) win against Czech Marketa Vondrousova on Tuesday.
"I wasn't missing that much," the 26-year-old Romanian player said after the match.
"I dominated a little bit more."
Halep, who is one of two former champions left in the draw, is now 17-1 on the season having already won a title in both singles and doubles at Shenzhen, China.
Halep and second seed Caroline Wozniacki have taken turns being No. 1 this year with Wozniacki grabbing it after beating Halep in three sets in the Australian Open final and Halep winning it back just prior to Indian Wells.
Halep won a title at the Indian Wells Tennis Garden in 2015 and Wozniacki won it in 2011.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)