Hau Lung-Bin, the Mayor of Taipei, has begun a four-day visit to Beijing.
Hau is here to take part in the Beijing International Tourism Expo, where he's set to try to market his city as a tourist destination.
This is his first visit to Beijing since he took office 8-years ago.
Hau is also due to meet mainland's chief of Taiwan affairs, Zhang Zhijun, following his return from Taiwan.
"He is my old friend and I feel happy to have a chance to meet him on June 29. I also hope to hear what he saw and heard during his visit to Taiwan and what he knew about Taiwan,"
As part of Hau's time, he's also due to inspect anti-terror facilities in the Beijing subway system.
"We want to know the measures Beijing subways have taken for safeguard security and see if there is something we can learn."
Security on the subway system in Taipei has become a concern following a mass stabbing a couple of weeks ago.