A major characteristic of Chinese instrumental variations is the use of identification motives called the hetou (refrain head) or hewei (refrain tail) that appear in the beginning and end of each movement. Again, except for these refrain motives, there might be no other relationship between the variations and the refrains or among the variations themselves. Sometimes, a movement appears several times among the other movements in a suite; this is considered a variation technique. Due to Western influence, ABA form has become extremely popular in modern instrumental folk music.
Therefore, the solution is to change the guidelines.