Online publication is equivalent to paper publication which can also be indexed in the database of EI Village approximately one month after the online date. Paper publications will be printed within around one year after online publication (content cannot be changed). The link is Online First Articles in our journal: https://link.springer.com/journal/12204/online-first. Journal's online articles can be found at SpringerLink[J]. J Shanghai Jiaotong Univ Sci.