LONG ENG SDN BHDandmanufacturer for bird nest and bird nest related products . LONG ENG SDN BHD, has many years of experience in formulating , manufacturing and retailing bird nest and Birdnest related products .LONG ENG SDN BHD also works with health food establishments, beauty salons, and multi-level marketing (MLM) companies to create customized formulations and private label health product for