[经] over-the-counter market
mǎi mài shuāng fāng zhí jiē jiāo yì shì chǎng ㄇㄞˇ ㄇㄞˋ ㄕㄨㄤ ㄈㄤ ㄓˊ ㄐㄧㄝ ㄐㄧㄠ ㄧˋ ㄕˋ ㄔㄤˇ