Zhou Chengyan doesn't know if he will always be in Lu Qian's memory, and he doesn't know if Lu Qian will always love him, but Zhou Chengyan will always love Lu Qian unconditionally and will agree to all Lu Qian's requests.
Lu Qian suffered from juvenile Alzheimer's disease. He began to forget many things, but in his memory he always loved Zhou Chengyan. During his illness, he fell in love with Zhou Chengyan again. This time in love, Lu Qian experienced all Zhou Chengyan's love, even if the final price was to be separated forever.
Intention: Even if I forget everything, I will still remember you