A further setback occurred in 1929 when Yu Yen proposed that the practices of herbal medicine be abolished to "eliminate obstacles to the progress of the nation's public health administration."
那是在民國十八年，當時在南京召開的中央衛生會議曾經通過了由余岩所提議的「廢止舊醫，以掃除醫事衛生之障礙案」。