Su-bīn-gí (書面語) sī jîn-lūi tī su-siá kah o̍at-tho̍k ê sî-chūn só͘ sú-iōng ê gí-giân hêng-sek. Su-bīn-gí sī kiàn-li̍p tī kháu-gí ê ki-chhó͘ bīn-téng, thàu-kòe āu-bóe bûn-jī ê hoat-bêng lâi hoat-tián. Bô ta̍k-ê bîn-cho̍k lóng ū hoat-tián chhut in ka-kī ê su-bīn-gí. Su-bīn-gí mā ài phòe-ha̍p bat-jī chiah ū hoat-tō͘ liáu-kái, bô tha̍k-chheh ê chheⁿ-mê-gû chiū tha̍k bô.