Write SQL query to solve given problem: How many Wikipedia pages are there on the language of the biwords pair "àbac-xinès"?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT COUNT(T1.pages) FROM langs AS T1 INNER JOIN biwords AS T2 ON T1.lid = T2.lid WHERE T2.w1st = ( SELECT wid FROM words WHERE word = 'àbac' ) AND T2.w2nd = ( SELECT wid FROM words WHERE word = 'xinès' )