The Soul of the East China Sea Returns to the Sky

A red box, a blank secret letter, a black magnetic coffin, the fate of several generations is entangled, two people on two lines, looking for the hidden truth. What is the reason for missing this world? Is it emotion? Is it a bond? Or endless curiosity and decryption? A lie at the beginning, how many lies will it take to close the loopholes? What is growth? Is it the ability to detect lies, or is it the ability to weave all kinds of lies?