The standards of express packaging are lagging, the recycling cycle is difficult, and the lack of environmental awareness is the three major bottlenecks that hinder the greening of express packaging. To break these bottlenecks, there is still a lot of work to do. For example, the current standards must be resolved. Issues such as lack of binding force, difficulty in implementation, and the introduction of national-level compulsory standards; To solve the "five flowers and big bundles" of express delivery and excessive packaging, first of all, we must solve the problem of rough handling, sorting, and improve the recycling of packaging materials. A very important part of the rate is that for consumers, recyclable packaging such as cardboard boxes, plastics and other garbage must be disposed of somewhere. The most suitable item for the above text title is:. ['There is a long way to go for greening express packaging.', 'Make a good combination of punches to help express green packaging.', 'There are three major bottlenecks to greening express packaging.', 'Greening express packaging requires comprehensive social governance.']