After the United States imposed so-called reciprocal tariffs on imports from China in April, Beijing took steps to help Chinese exporters sell their products domestically.In addition to the staging of product promotion events across the country and the offering of fiscal and financial incentives, Beijing also encouraged the increased use of letters of credit (L/Cs) to help such businesses switch focus to the domestic market.What is a domestic letter of credit?A letter of credit, also known as...