What is the allusion to sit down, please sit down, please sit down?

Couplet:\r\nPlease take a seat, please take a seat,\r\nTea, tea, good tea\r\n\r\nThere is a legend that Zheng Banqiao went to a teahouse to drink tea one day, and the waiter looked at him The clothes were not rich enough, so he casually said "sit". Someone at the counter said "tea".\r\nWhen he took out the silver ingot, the waiter's eyes lit up and he changed his words and said, "Please sit down". The counter responded and served tea. .\r\nAt this time, someone in the store recognized Zheng and came over to say hello. The waiter panicked and quickly bowed and said, "Please sit down." The counter also raised his voice and served tea.\r\nThe boss came to serve him respectfully. He was asked to keep a calligraphy treasure, and he reluctantly agreed. In order to satirize the store's tendency to follow the crowd, he wrote this couplet.\r\n\r\nAnother one said that Su Shi came here after visiting Mogan Mountain. Go to a temple on the mountainside. Seeing that the visitor was dressed very simply, the Taoist priest greeted him coldly: "Sit down!" and ordered the child: "Tea!" Su Shi sat down and drank tea. He casually chatted with the Taoist priest for a few words. When the Taoist priest saw the visitor, he made extraordinary remarks. He immediately invited Su Shi into the hall, put down a chair and said, "Please sit down!" Su Shi was full of witty words, and Taoist people kept saying yes. The Taoist priest couldn't help but ask Su Shi's name. Su Shi said modestly: "The junior official is Su Zizhan, the general magistrate of Hangzhou." The Taoist priest quickly stood up and invited Su Shi into a quiet and elegant living room. He said respectfully: "Please take a seat!" and gave instructions. The Taoist boy who accompanied him said: "Honoring tea!" Seeing that the Taoist priest was very snobbish, Su Shi took his leave after sitting for a while. Seeing that Su Shi could not be retained, the Taoist priest asked Su Shi to write an inscription as a souvenir. Su Shi wrote a couplet: "Please take a seat, please take a seat. Tea, tea, tea, fragrant tea."