“…Therefore, the investigation of the production and decay of the candidates becomes crucial. There have been only a few references studying the production [7,34,39,[74][75][76][77][78][79][80][81] and decay [1,44,58,59,[82][83][84][85] of fully-heavy tetraquarks. Worthy of mentioning, References [76,77] for the first time extended nonrelativistic QCD [86] to the evaluation of fully-heavy tetraquark production.…”