Excuse me, are these cards out of print? How to distinguish out-of-print cards

Hello, these cards are not out of print, because there are many such cards on the market now.

If you encounter similar problems in the future, you can solve them according to the following ideas:

1. Find the problem: people often live in the world and are always in various contradictions. When some contradictions are projected into consciousness, individuals find themselves a problem and seek solutions. This is the stage of finding problems. From the stage of solving the problem, this is the first stage and the premise of solving the problem.

2. Analysis of problems: To solve the problems found, it is necessary to clarify the nature of the problems, that is, to find out what contradictions are, which contradictions and their relationships, so as to clarify what results the problems to be solved must achieve, what conditions they must have, the relationship between them and what conditions they already have, so as to find out important contradictions and key contradictions.

3. Propose assumptions: On the basis of analyzing the problem, propose assumptions to solve the problem, that is, possible solutions, including what principles and specific ways and methods to adopt, but all these are often not simple and ready-made, and there are various possibilities. However, putting forward assumptions is the key stage to solve the problem. Correct assumptions lead to the smooth solution of the problem, while incorrect and inappropriate assumptions make the solution of the problem detour or lead astray.

4. Test hypothesis: Hypothesis only puts forward N possible solutions, which does not guarantee that the problem will be solved, so the last step of problem solving is to test hypothesis. No matter which test fails to get the expected result, it is necessary to put forward another hypothesis and retest it until the correct result is obtained, and the problem is solved.