[经] organized security exchanges

yoǔ zǔ zhī de zhèng quàn jiāo yì suǒ ㄧㄡˇ ㄗㄨˇ ㄓ ㄉㄜ˙ ㄓㄥˋ ㄑㄩㄢˋ ㄐㄧㄠ ㄧˋ ㄙㄨㄛˇ