Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_38996 ( "Jyutping" text, "Character" text, "Portuguese" text, "Relative value" text, "Metric value" text, "Imperial value" text )

### Question ###
What metric value has a jyutping of lei4?

### Accurate SQL ###

SELECT "Metric value" FROM table_38996 WHERE "Jyutping" = 'lei4'