In　[Chen　et　al.,　2020],　the　third　author　and　other　coauthors　studied　global　dynamics　of　the　following　system:　＇Equation　Presented＇　in　the　parameter　region　{(b1,b2,b3,b4)　∈　4:　b2　0,b4　≠　0}　in　this　paper.　Firstly,　we　study　the　local　dynamics,　such　as　the　bifurcations　of　equilibria　(including　the　equilibrium　at　infinity).　Secondly,　the　number　and　stability　of　limit　cycles　are　studied　completely.　Then,　we　analyze　the　existence　of　upper　and　lower　saddle　connections　and　homoclinic　loops.　Moreover,　we　show　that　there　are　no　heteroclinic　loops　in　this　parameter　region.　Finally,　we　give　the　bifurcation　diagram　and　all　global　phase　portraits　on　the　Poincaré　disc　are　given　as　well　as　some　numerical　examples.　©　2021　World　Scientific　Publishing　Company.