1949年，上海俾中共佔領前夕，唐季珊前往香港，後又輾轉到臺灣。雖然此後風光唔及得上華茶，但佢經常造訪茶行，鼓勵生產並輔導外銷高級茶葉。後來茶行第二代長成並熟習英語，唐又教導參與投標英美嘅方法，最終使洋行漸次消退。另外，留喺上海嘅華茶公司畀咗唐氏家族第啲人經營，卒之喺1954年宣告歇業。
In 1949, on the eve of the occupation of Shanghai by the Chinese Communists, Tang Jishan went to Hong Kong and later to Taiwan. Although the scenery was not as good as that of Chinese tea, he often visited tea shops to encourage the production and guidance of high-end tea for export. Later, the second generation of the tea shop grew up and became familiar with English, and Tang taught the British and American methods to participate in the bidding, which eventually led to the gradual decline of the foreign trade. In addition, the Huacha Company that remained in Shanghai was run by someone else in the Tang family, and finally closed down in 1954.