This is a lot easier than you might think! Create a custom course with the same 18 easy par 5s (I chose the 2nd at Sheshan). Drive on the fairway (if you don't use the driver the distance doesn't matter, so if you've already got driving average up to around 330yds use a 1-iron to drive). Lay up short and flop shot within a few feet of the hole. So you get 100% FIR and GIR, make sure you get close and 1 putt. Your stats will shoot up. Once you are within about 0.5 of 12, just do the custom drills to boost the last bit to 12.