1967, the "May 7th Incident" took place: When Zhang Chunqiao and Yao Wenyuan, both later reviled as members of the Gang of Four, visited Jinan to support the Cultural Revolution and its local leader Wang Xiao Yu, fighting erupted in the front of the provincial government between two rival factions of the Cultural Revolution, the "April 22nd Group" and Wang Xiao Yu's "April 28th Group". In the end, more than 10,000 people had been involved in the fighting. On October 11, 1967, the tallest statue of Mao Zedong in Shandong province was erected on the campus of Shandong Normal University. On September 17, 1968, a large assembly of Jinan workers celebrated the arrival of a mango fruit in the "August 1st" Meeting Hall. The fruit had been a gift to the workers in Beijing by Mao and was subsequently passed on to the workers in Jinan. In November 1968, Wang Xiao Yu began to agitate against the local army units in Jinan and Shandong Province. By then unrest due to the Cultural Revolution had severely damaged the city's governmental and industrial infrastructure, with about 80 percent of all government institutions shut down. Large public protests were staged on April 4 and 5, 1969, in which approximately 500,000 people protested the occupation of Zhenbao Island by the Soviet Union. On July 29, 1970, the leadership of the Cultural Revolution passed a resolution to make sweeping changes to the city's educational system: The liberal arts departments of Shandong University were moved to Qufu and combined with Qufu Normal College to form a new Shandong University. The biology department was moved to Tai'an and merged into the Shandong Agricultural College. The rest of the sciences were to form the Shandong Science and Technology University. Shandong Normal University was to be moved to Liaocheng. Shandong Medical College and Shandong College of Traditional Chinese Medicine were to be merged and moved to Tai'an. Shandong University was restored in its original form and the "Shandong Science and Technology University" was abolished in early 1974. The first reversals of Cultural Revolution policies started in early 1971: On May 23 of that year, the Shandong Provincial Museum was reopened after having been closed for about 5 years (since May 1966). In the next year, the Jinan Committee for the Cultural Revolution officially reverted the name changes of four city districts enacted in 1966. During the 6 years between