Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: During a speech addressing the Houses of Parliament at Westminster this week, Chinese president Xi Jinping spoke at length about the relationship between China and the UK. As well as discussing the future of Sino-British ties, Xi also mentioned the lesser-known collaboration between the two countries in the past. In particular, four groups of people, including a naval cadet, a nurse and two British peers, were seen to highlight a relationship built on mutual understanding, support and friendship, reported People's Daily Online. Xi's examples led with 24 naval cadets who took part in the D-Day Landings in Normandy in 1944, fighting side by side with British forces.Xi Jinping addressed Houses of Parliament early this week in State VisitHe cited four incidences that highlighted past Sino-British relationshipsThe Chinese president concluded with optimism for the countries' future 
 Question:Xi Jinping, who is staying at Buckingham Palace, is expected to conclude his _ on October 23.

State Visit