The United States and China on Monday agreed to hold regular conversations about commercial issues and restrictions on access to advanced technology, the latest step this summer toward reducing tensions between the world’s two largest economies. The announcement came during a visit to Beijing by Gina Raimondo, the U.S. commerce secretary, who is meeting with senior Chinese officials in Beijing and Shanghai this week. The agreement to hold regular discussions is the latest move toward rebuilding frayed links between the two countries, a process that had already begun during three trips in the past 10 weeks by senior American officials:…