“…Characteristics of users and stations, influencing factors, and built environment are all main research contents. Users' gender [2][3][4][5][6][7], age [3,[6][7][8], income and education [2,5,6,9,10], weather conditions [11][12][13], infrastructure construction, population density, built environment [7,[12][13][14][15][16][17][18][19], and relationship with other means of transportation [20][21][22][23][24][25][26][27][28][29][30][31][32][33] have been confirmed to affect the usage of bike-sharing. On the other hand, 2 of 17 in order to solve the problem of rebalancing, optimization of BSSs has also become another hot issue [34][35][36][37][38][39]…”