According to your question, there is no such specialty as white tree root in Sichuan, and there are similar ones: Adenophora adenophora, Codonopsis pilosula and carrot.

Sichuan specialties are: great chicken, seven-star pepper, cinnabar lotus, Eucommia ulmoides, Hanyuan pepper, Tongjiang tremella, Pixian watercress, Hejiang litchi, Deng Ying beef, Guanghan wrapped silk rabbit, boiled cabbage, kung pao chicken crispy pork, Zhang Fei beef, Tianfu peanut, fish-flavored shredded pork, hot and sour bean curd, three cannons, konjac roast duck, eggs, middle-aged and old-aged bacon, Yibin burning noodles, husband and wife's lungs, Lai Tangyuan, Guangyuan walnut, Langzhong Tongyou Tianchi lotus root starch, Luzhou King soy sauce Baoning vinegar Quxian Huanghua Jiajiang bean curd Mapo bean curd Cangxi Sydney Xufu Yalong Du Xiangming Fushun bean curd bean curd cabbage bean curd bean curd lateral ear root Cordyceps duck white peony root Chengdu Fengwei crisp "Erjingtiao" pepper Fritillaria, Poria, Coptidis Rhizoma, Toosendan Fructus, Radix Aconiti, Radix Aucklandiae, Bear Bile, Morinda officinalis, Radix Ophiopogonis, Radix Cyathulae, Sichuan Sausage Sichuan Dazu Sufu Shan Gui brand new variety kimchi spiced beef jerky Yue Ying brand.