Part of a classic three-tier scale from Chinese strategy thinking:
上策 (shàngcè, best plan) →
中策 (zhōngcè, middling plan) →
下策 (xiàcè, worst plan). The triplet appears throughout 《
孙子兵法》 (The Art of War) and 《
三国演义》 (Romance of the Three Kingdoms) when advisors lay out options for a ruler.