CREATE TABLE table_16490 ("Rank" FLOAT, "English title" TEXT, "Chinese title" TEXT, "Average" FLOAT, "Peak" FLOAT, "Premiere" FLOAT, "Finale" FLOAT, "HK viewers" TEXT)

What amount is the number of hk viewers where chinese title is ?
SELECT "HK viewers" FROM table_16490 WHERE "Chinese title" = '十兄弟'
SELECT "HK viewers" FROM "table_16490" WHERE "Chinese title" = '十兄弟'