Walnut variety problem: some varieties are slow to color, and may not change too obviously for several months, such as Nanjiang stone. Quality of walnuts: Quality is the most fundamental factor that determines whether walnuts can be wrapped perfectly. Either way, as long as you play patiently, you can make perfect patina. The problem with fake walnuts: resin walnuts will not turn red no matter how long they are placed. Players' own reasons: they didn't choose the right way to play.

1. Walnut varieties: Some varieties are easy to color, such as the fourth floor of Pinggu, apple orchard and white lion. Generally, you can see obvious discoloration in more than a month. However, some varieties change color slowly, and may not change significantly after a few months, such as Nanjiang stone.

2. Walnut quality: Quality is the most fundamental factor that determines whether walnuts can be wrapped perfectly. Either way, as long as you play patiently, you can make perfect patina. But if the quality is not good, any variety is useless. The best season for walnut trees is around the Millennium. If trees are planted too early, walnuts will be immature. Such walnuts tend to blacken their ends. Although some can turn red, it is difficult to knead them into bright amber.

3, the problem of fake walnuts: resin walnuts will not turn red no matter how long they are placed.

4, the player's own reasons: did not choose the right gameplay.