They were the first South Korea - China prime ministerial talks in three years.
The officials touched on one of the most urgent regional issues: fine dust.
Lee Nak-yon... and Premier Li Keqiang talked on the sidelines of the annual (boe-oww)Boao Forum for Asia on Wednesday.
Seoul's PM proposed strengthening cooperation by expanding ties in joint research programs and measures of early warning systems to tackle the issue.
He also requested closer partnership between the two sides on joint research over the exact cause of the pollutant and devising countermeasures together.