He then joined the teaching staff at NTU. Li Chin-lung, later chairman of the Council of Agriculture and at the time chief of the COA's domestic production department, sought Lin's help and asked him to visit the mango production area to get a concrete understanding of where the crux of the problem lay.
前農委會主委、時任農委會國產科長的李金龍向他求救，請他走訪產地，實際瞭解癥結所在。