“…A lot of relevant issues have been widely discussed based on the braneworld models, see e.g., Refs. 9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28. In Refs. 29,30,31, the researches show that confining our universe on the negative tension brane leads to a wrong-signed Freedmann-like equation.…”