“…first provided a new method, which was combined with subsystems' Lyapunov functions and topological structure of networks to construct a global Lyapunov function. Compared with some references [31, 32], which used the linear matrix inequalities method, the method we use can not only help us constructing a suitable Lyapunov function which is related to the topological structure of networks, but also avoid solving linear matrix inequalities. Remark 4 In recent years, many scholars have investigated the dynamical behaviours of delayed systems such as stabilisation [18, 33] and synchronisation [25, 34]. In [33, 34], they restricted the range of time‐varying delays .…”