CREATE TABLE table_38996 ("Jyutping" CLOB, "Character" CLOB, "Portuguese" CLOB, "Relative value" CLOB, "Metric value" CLOB, "Imperial value" CLOB)

What metric value has a jyutping of lei4?
SELECT "Metric value" FROM table_38996 WHERE "Jyutping" = 'lei4'
SELECT "Metric value" FROM "table_38996" WHERE "Jyutping" = 'lei4'