Běn cì lùntán de yùhuìzhě láizì èrshí duō ge guójiā.
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Tips
usage
Note 与 here is read yù (to take part in), not yǔ (and). 与会 (yùhuì) = to attend a meeting; -者 (zhě) = the one who. Compare 参会者 (cānhuìzhě), a near-synonym slightly more common in business writing.
mistakes
Don't read this as yǔhuìzhě. The yù reading is reserved for 'participate', as in 参与 (cānyù). Mispronouncing it is a giveaway among learners.