add info about perf

Author: allnes

docs/common_information/points.rst

@@ -74,6 +74,36 @@ Points
 
   - **Total : 54 points**
 
+- The rule for earning performance points.
+
+  The ratio of efficiency percentage to points percentage, where the maximum points is 100% and the minimum points is 0%.
+
+    +----------------+-------------------+
+    | Efficiency (%) | Points percentage |
+    +================+===================+
+    | > 60%          | 100%              |
+    +----------------+-------------------+
+    | [50, 60)       | 90%               |
+    +----------------+-------------------+
+    | [45, 50)       | 80%               |
+    +----------------+-------------------+
+    | [42, 45)       | 70%               |
+    +----------------+-------------------+
+    | [40, 42)       | 60%               |
+    +----------------+-------------------+
+    | [37, 40)       | 50%               |
+    +----------------+-------------------+
+    | [35, 37)       | 40%               |
+    +----------------+-------------------+
+    | [32, 35)       | 30%               |
+    +----------------+-------------------+
+    | [30, 32)       | 20%               |
+    +----------------+-------------------+
+    | [25, 30)       | 10%               |
+    +----------------+-------------------+
+    | < 25%          | 0%                |
+    +----------------+-------------------+
+
 - Report
 
   +--------------+--------------+--------------------+-------+