卖菇凉的小火柴采菇凉的小蘑菇
[mài gū liáng de xiăo huŏ chái căi gū liáng de xiăo mó gū]
'Selling the girl’s small matches picking up girls' little mushrooms'. Likely refers to fairy tales, especially one similar to the Little Match Girl but with a slightly more positive twist involving mushroom picking, suggesting a poetic yet humble origin.