深信与你失信与我
[shēn xìn yŭ nĭ shī xìn yŭ wŏ]
'I firmly believe in you, but it's me who is letting down the trust.' This nickname reflects a sense of irony. It suggests that while the person might completely trust and believe in their partner, they somehow failed to meet that same standard on their part, leading possibly to regret or self-reflection.