Specialissue: In English, it is a special issue. It can't be said that special issues are worse than regular ones. The purpose of the special issue is to discuss Huashan's sword in view of a current research hotspot, so as to attract attention. Those who publish papers in specialized journals generally do better in this field. The difference between a special issue and a general issue is that the period of publishing papers is shorter, mainly around a certain topic. Because it takes up publishing space, it can be regarded as the root.
1, published regularly: published regularly every year according to semi-monthly/bimonthly/quarterly/semi-annual.
2. Special issue: a special issue published in an academic field, such as an important breakthrough in brain surgery and a breakthrough in the study of the uplift of the Qinghai-Tibet Plateau. Some special issues are published by a research group, and the whole book is published by them.