"Tang Yun", "Ji Yun", "Yun Hui" give the pronunciation as fu rong qie, same pronunciation as "feng". The meaning is the same as "feng". "Shuowen Jiezi" explains it as a smoke and fire signal used for alarm. If there is an emergency on the border, fire is lit to warn. "Yangzi · Fangyan" records that "㷭yu" means to watch and observe. "Qian Hanshu · Han Anguo Zhuan" also has the record of "setting up 㷭". For a detailed explanation, please refer to the annotation of the character "feng".