New Delhi: Railway Minister Piyush Goyal on Saturday indicated that the financial aspect of the ambitious bullet train project between Mumbai and Ahmedabad was being reviewed as the post-Covid world will entail "a lot of tightening of the belt".Speaking at the India Global Week, he, however, said the Railways was "committed to these projects" and "we are at the stage of finalising plans and costing" for them."Certainly Covid-19 has been a little bit of spanner in terms of the ambitions that we had around the bullet train project and we are relooking at all the projects in terms of the post-Covid world that will entail a lot of tightening of the belt, a lot of cost cutting and improving our efficiencies and aligning ourselves to how travel.