People with the Earth Rat (土鼠) designation may be lacking the water element in their 五行 (Wǔ Xíng， five elements). From the perspective of 五行， earth and water counteract each other， and water can appear insufficient when earth is abundant.

Here's a breakdown of what the Earth Rat designation means:

Years: Earth Rat years include 1948 and 2008 (戊子年).

Characteristics: Earth Rats are known for being stable， content， and having a carefree nature， ensuring they have enough food and wealth throughout their lives. They are also practical and trustworthy.

Possible shortcomings: They can be overly realistic， which can make them seem selfish or petty. They often are self-assured and judge others by their own standards.

It is important to note that 五行 analysis is a complex system， and a full assessment requires examining a person's entire birth chart， not just their zodiac year.