Liansi paper is a kind of traditional handmade bamboo paper produced in Yanshan County, Jiangxi Province, whose handicraft technique is listed as a national intangible cultural heritage protection project. This study conducted a field survey in Shangrao, and the main survey areas included Guangxin District and the Hekou, Goose Lake, Gexian Mountain, Tianzhu Mountain, Chenfang, and Shitang townships. Field investigators communicated with a group of intangible cultural heritage inheritors, and with their assistance, clarified the steps and processes involved in the production of Liansi paper. The handicraft technique of Liansi paper consists of five steps: chopping bamboo to make bamboo filaments, steaming bamboo filaments to make bamboo pulp, interweaving fibers into wet paper, drying wet paper, and package processing. A total of 13 processes are involved: chopping bamboo, fermentation, making bamboo filaments, soaking bamboo filaments, steaming bamboo filaments, natural bleaching, pounding bamboo filaments to make bamboo pulp, stirring pulp, adding plant mucilage, interweaving bamboo fibers into wet paper, pressing paper, drying wet paper, and package processing.