国产菇凉很坚强
[guó chăn gū liáng hĕn jiān qiáng]
This phrase celebrates the strength of young Chinese girls (国产 meaning made in China) with a playful reference to '菇凉' (a misspelling of '姑娘' which refers to a young lady). The overall meaning here is 'The Chinese girl is very strong/brave.'