The paper presents a novel approach to achieve chiral dynamics in a non-Hermitian system without the need for a closed trajectory around exceptional points (EPs). The authors demonstrate that by using an open trajectory linking two infinite points with the same asymptotic eigenmodes, high-efficiency chiral transmission can be achieved. This method is experimentally implemented in a coupled silicon waveguide system at telecommunication wavelengths. The key to this approach is the non-adiabatic jump (NAJ) process, which selectively couples loss to one of the eigenmodes during the evolution, leading to asymmetric mode switching. The chiral dynamics is theoretically predicted and experimentally verified, showing that the output state depends on the direction of evolution, with different modes output for opposite evolution handedness. The results provide a new strategy for chiral dynamics with superior performance, paving the way for practical chiral-transmission devices.The paper presents a novel approach to achieve chiral dynamics in a non-Hermitian system without the need for a closed trajectory around exceptional points (EPs). The authors demonstrate that by using an open trajectory linking two infinite points with the same asymptotic eigenmodes, high-efficiency chiral transmission can be achieved. This method is experimentally implemented in a coupled silicon waveguide system at telecommunication wavelengths. The key to this approach is the non-adiabatic jump (NAJ) process, which selectively couples loss to one of the eigenmodes during the evolution, leading to asymmetric mode switching. The chiral dynamics is theoretically predicted and experimentally verified, showing that the output state depends on the direction of evolution, with different modes output for opposite evolution handedness. The results provide a new strategy for chiral dynamics with superior performance, paving the way for practical chiral-transmission devices.