First of all, start with the training of basic standing posture. The inner thighs are clamped, the knees and heels are close together, and the toes are slightly opened, forming the habit of tightening the inner thighs and knees and toes facing forward.
Secondly, leg press's instep valgus leg press can play a very good role in correcting the inner eight characters. Don't forget to open the toe of the main leg when you are in leg press.
Third, the correction of the "inner eight characters" should run through every dance step, with special emphasis on the footwork when the feet are in and out. When stepping out, the thighs are buckled, the ankles are inward, and the stretched instep is turned outwards and stretched forward. When closing the foot, the main leg turns to the hip to drive the knees and ankles of the strength leg to retract inward toward the main leg, and the extended instep always moves forward during the whole process.