The biggest pain point: GB7714-87 places the year after the journal name, but before the volume. EndNote's default places year after volume.
Unique to the GB/T 7714 family is the use of bracketed letters to denote the medium type: [J] : Journal articles [M] : Monographs (Books) [D] : Dissertations/Theses [R] : Reports [P] : Patents gb7714-87 endnote