July 30, 1998 (in June eighth day Tiger years) participated in the rescue of Pisa, Cao when oblique.



famous Leaning Tower of Pisa In July 1998, 30 were invited to the 30 Chinese experts to save the Leaning Tower of Pisa ideas when Cao told reporters in Pisa in Italy, after fieldwork rescue the tower more confidence, greater grasp ". rectifying and reinforcing expert
as the Chinese buildings Cao when fieldwork, the Bi Sata its environment due to conditions inside and outside better than he had originally imagined, he said, he invented the "tilt Guta corrective method "grasp to save the Leaning Tower of Pisa in 10 months time. According to Cao when introduced, his rescue plan to adopt structural reinforcement to reduce the weight of the tower and foundation combined governance approaches.
Cao when Italy Friendship Association 'Lanciotti Mr. invitation arrived in Rome on the 28th. In Italy during his stay, he will save the Leaning Tower of Pisa, a series of problems with the Italian authorities concerned, especially the technical aspects of the Leaning Tower of Pisa Rescue Committee. Cao when "to save the Leaning Tower of Pisa is the aspiration of my life". the local
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Leaning Tower of Pisa