Daily Chinese Idiom Guessing Game
To stick to one's own way of doing things regardless of others' opinions.
素平素，向来。不管人家怎样说，仍旧按照自己平素的一套去做。
《礼记·中庸》君子素其位而行，不愿乎其外。素富贵行乎富贵，素贫贱行乎贫贱，素夷狄行乎夷狄，素患难行乎患难，君子无入而不自得焉。”
Despite the criticism, she continued to do her work her way, truly practicing 'wǒ xíng wǒ sù'.