Marco Nicolini (2nd R), Captain Regent of San Marino, delivers a speech with Gian Carlo Venturini (2nd L) in the city of San Marino, San Marino, on May 6, 2021. A series of celebrations and commemorative activities were held in San Marino on Thursday to mark the 50th anniversary of the establishment of diplomatic relations between San Marino and China. (Xinhua/Cheng Tingting)