饭圈 (fan-circle) hierarchy term.
粉 = fan,
核心粉 = the inner ring who do the actual work: running
数据组 (streaming/voting groups),
集资 (fundraising),
应援 (event support). Surrounded by
大粉 (BNFs / 'big fans' = top influencers within the fanbase) and the wider
路人粉 ('passerby fans' = casual followers). For brands,
核心粉 maps onto repeat buyers and brand evangelists.
