Notes:
Pine:
Known as an evergreen, the pine tree represents longevity and endurance because it retains its green needles even through harsh winters.
Bamboo:
Bamboo, with its flexibility and ability to bend but not break, symbolizes strength, resilience, and adaptability.
Plum (as part of the "Three Friends of Winter"):
The plum tree, along with pine and bamboo, is part of the "Three Friends of Winter" motif, which represents longevity, constancy, and flowering during winter.
Rock:
Rocks, like pines, are also seen as symbols of solidity and endurance.
The "Three Friends of Winter":
Together, the pine, bamboo, and plum (and sometimes a stone) represent the ability to endure hardship and maintain virtue, even in the face of adversity.