你死了我一定去参加你的葬
[nĭ sĭ le wŏ yī dìng qù cān jiā nĭ de zàng]
This username translates to 'If you die, I will definitely attend your funeral.' It implies a promise of being present during crucial moments in one's life, reflecting a deep bond and the willingness to stay by someone's side through both good and bad times.