Koi Fish Element: Koi fish symbolize "wealth, good fortune, and advancement," carrying strong positive psychological connotations in Eastern culture. They are typically red and gold, creating a strong visual contrast and making the completed puzzle highly visually appealing.

Coin Element: Coins represent "sources of wealth, accumulation, and stable wealth." Combined with koi fish, they form a "dynamic + static" imagery of wealth (flowing wealth + accumulated wealth).

Moderate Difficulty: 1000 pieces is a "mainstream difficulty" for adult puzzles; not too easy (lacking challenge) nor too difficult (prone to giving up).

High Companion Value: Suitable for several hours or even days of play, ideal for stress relief, solitude, and parent-child interaction.