Jang is in her rookie season on the LPGA Tour after qualifying at last December's Tour School. She has played the Korean LPGA Tour for five years prior and finished 3rd at the Evian Championship last year indicating her readiness for the LPGA Tour.
Around 50 of the 118 player field will be required to finish their rounds off on Friday morning before the cut is made.
Rookie, Minjee Lee, currently leads the Australians at 2 under and in 16th position but still has several holes to complete round two.
Katherine Kirk is 23rd and Sarah Jane Smith 37th although both have holes to play while Karrie Webb is finished at 4 over and in 66th position which will probably good enough to make the cut.
Want video tips delivered straight to your inbox? Subscribe to iseekgolf.com newsletters.