update

docs-2.0/20.appendix/0.FAQ.md

@@ -74,6 +74,10 @@ It is a known issue. Just retry 1 to N times, where N is the partition number. T
 
 Starting with Nebula Graph 3.0, the statements `LOOKUP`, `GO`, and `FETCH` must output results with the `YIELD` clause. For more information, see [YIELD](../3.ngql-guide/8.clauses-and-options/yield.md).
 
+### "How to resolve the error  `To get the property of the vertex in 'v.age', should use the format 'var.tag.prop'`?"
+
+From version 3.0, `Pattern` supports matching multiple tags at the same time, so you need to specify additional Tag names when returning attributes. From `RETURN variable_name.property_name` change to `RETURN variable_name.Tag.property_name`.
+
 ### "How is the `time spent` value at the end of each return message calculated?"
 
 Take the returned message of `SHOW SPACES` as an example: