Hacker and Alien.

Summary

Yang Hai Chen is confused by a mysterious character encountered in a data set, which his teacher, Zhang Ji Min, had also faced five years ago. After deleting the character, a blue screen appeared on his computer, raising questions about its significance. Both Yang Hai Chen and Zhang Ji Min analyze the character, suspecting it may relate to a password or optimization program, but struggle to understand its role. The reappearance of the character and an accompanying string of numbers perplexes them. Zhang Ji Min notes that the character resembles "dense," potentially hinting at a complex password, yet the true nature of the data remains unclear, leaving Yang Hai Chen frustrated and puzzled.

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