Your father's students are all over the world. There is no need to plant flowers in front of the house.
2. Silkworms in spring will weave until they die, and candles will drain the wick every night. -Don Li Shangyin "Untitled"
Spring silkworms don't spin silk until they die, and tear-like wax oil can only drip dry when candles burn to ashes.
3. After the flowers are gathered into honey, whoever works hard for them will be sweet. -Tang Luoyin "Bees"
Bee, you picked all the flowers and made nectar. Who are you working for and who do you want to taste the sweetness?