North and South Korea's nuclear envoys meet in the Chinese capital.
Ri Yong-ho and his South Korean counterpart Wi Sung-lac are expected to discuss the North's nuclear programme.
This comes after their meeting in July, when they held high-level talks for the first time in two years.
After which they said they would work to resume the stalled six-party talks for nuclear disarmament on the Korean peninsula.
Ri did not give much away as he left after their private talks.
Wi confirmed there was more to discuss later.