The former chairman of the Joint Chiefs of Staff under the Bush and Obama presidencies, Mike Mullen, will head up the team - and will be accompanied by former deputy national security advisors under Bush Michele Flournoy and Meghan O'Sullivan. The additional two officials are former senior National Security Council directors for Asia Evan Medeiros and Mike Green will also be on the trip. 

"This is to demonstrate our support for Taiwan," a Biden official told Reuters. Additionally Taiwan recently revealed that Trump's former Secretary of State Mike Pompeo will visit Taipei in the first week of March, which is not connected with the official Biden delegation; instead, Pompeo is said to be visiting as a "private citizen" - though still without doubt it will be taken as provocative by Beijing.