1. "Now I still cook Laba porridge every year, not to sacrifice Buddha, but to commemorate my mother. The change from "offering Buddha" to "commemorating mother" reflects the change from gratitude to gratitude. 2. The clue of this article is the commemorative significance of Laba porridge. Through this clue, the article connects the Buddha's Light Festival (a Buddhist festival), the anniversary of mother's death and the anniversary of Premier Zhou's death in series.