What did Qianlong do when he went to the south of the Yangtze River to Songyang?

Songyang tea style is very popular. Many literati come to Songyang just to taste Maoshan Immortal Tea, the first tribute tea of ??the Tang Dynasty, in order to seek longevity. The same goes for Qianlong, who came to find Maoshan Immortal Tea, so He was the longest-lived emperor at 89 years old. The second-longest lived emperor was Wu Zetian. Wu Zetian also drank Maoshan fairy tea and had no wrinkles even in her 70s.