In 1973, under the direction of Eugene Ormandy (1899-1985), the Philadelphia Orchestra became the first orchestra from the United States to perform in China since the founding of the People's Republic of China in 1949.

Since that visit, the orchestra has returned 12 times, developing deep, impactful connections throughout China as a result of concerts and residencies that led to people-to-people exchanges.

Booth, who was 23 in 1973, was the orchestra's youngest violinist.

He was not supposed to join the China tour that year, but he received a phone call telling him he was needed as a replacement for a musician who could not make the trip. Booth was both shocked and thrilled. He did not even have a passport at the time.

During the tour, the Philadelphia Orchestra met and worked with musicians from the China National Symphony Orchestra, formerly known as the Central Philharmonic Society. Zhu was the Chinese orchestra's first violinist.

At their reunion, Booth told Zhu, "We can play Bach's Double," referring to Bach's Concerto for Two Violins in D Minor.

"No, I cannot play now. I played as a violinist for 40 years and later worked in the managing group, but I have not played the violin for a very long time," Zhu replied.

Booth said, "No, I'm sure you can," adding that it was his 51st year playing as a violinist with the Philadelphia Orchestra.