In fact, she was indifferent to Lin Yifan's death; it was only the life and death of An Qi that concerned her.
Lin Yanping never expected her Master to say such words. She had thought that her Master wanted them to protect Lin Yifan because he was important to her, but it turned out not to be the case.
At that time, she became more and more curious about who Lin Yifan's girlfriend was and why her Master cared about her so much.
Therefore, she visited An Qi in the hospital under a different identity and found that An Qi indeed looked very beautiful; truth be told, for a moment, she felt lost and jealous, and she had a strong urge to scratch An Qi's face or to kill her outright.
However, she eventually forbore; now that Lin Yifan was dead, such actions would be meaningless. She might as well do some good deeds to increase her own longevity instead.
The landlady grandma didn't tell Zhou Jiajia and the others about Lin Yifan's death, to spare them the unbearable grief.