yuán / běn / tā / shì / kè / rén / dàn / tán / pàn / zhōng / tā / fǎn / kè / wéi / zhǔ / zhǎng / wò / le / zhǔ / dòng / quán

原本他是客人，但谈判中他反客为主，掌握了主动权。

Originally he was the guest, but during negotiations he turned the tables and took control of the initiative.