Product Numbering & Bar Code Verification of Phantom Plarail Sets

I respect everything you and Nayuho did to make this project a big success! You even formulated a direct answer to decode the ST mark, all by yourself. I am so glad that I am learning from top class backend researchers like you and Nayuho, and applying these skills in what I do now. I will read everything from top to bottom in this thread and taste what its like to plan and execute such a huge project that lasted for nearly 1 and a half years.