返虚入浑

Explanation: ① poems that ethereal, totally into the realm. ② that the people ignorant, unexamined. 　　Source: Tang Comments of "forceful Sikong" virtual back into the muddy, the plot for the male health. " 　　Examples: They are ~, they are equal to 'no' - the world is tantamount to not like them. ★ Guo, "Do not Tap solo"