CREATE TABLE table_203_576 (id DECIMAL, "rank" DECIMAL, "nation" TEXT, "gold" DECIMAL, "silver" DECIMAL, "bronze" DECIMAL, "total" DECIMAL)

what is the difference in silver medals between china and chinese taipei ?
SELECT (SELECT "silver" FROM table_203_576 WHERE "nation" = 'china') - (SELECT "silver" FROM table_203_576 WHERE "nation" = 'chinese taipei')
SELECT (SELECT "silver" FROM "table_203_576" WHERE "nation" = 'china') - (SELECT "silver" FROM "table_203_576" WHERE "nation" = 'chinese taipei')