When it comes to Traditional Chinese Medicine (TCM), roots play a big part: TCM has its "roots" firmly planted in millennia of natural healing; the ginseng "root" itself is synonymous with TCM; and for Lee Heng Sheng - the great-grandson of Mdm Ng Sock Eng, a second-generation TCM veteran in Singapore who founded Heng Foh Tong Medical Hall in 1957.