There are five species of chickpeas, which are China's flat-breasted turtles, Myanmar's flat-breasted turtles, Vietnam's flat-breasted turtles, Yunnan's flat-breasted turtles and Thailand's flat-breasted turtles. Yunnan flat-breasted turtle and Thailand flat-breasted turtle belong to the branch of Chinese flat-breasted turtle species. Checkbill tortoises are very different from other tortoises. Checkbill tortoises have a very long tail, which is almost the same length as their bodies. There are hooks on the top of the mouth, which is similar to the olecranon, so it is called olecranon. Eagle-billed turtle is an amphibian, which can crawl on land and swim in water. It mainly lives in rivers in the mountains, and its food is small fish, shrimp and insects.

The sexual maturity age of olecranon is generally 5-6 years old, and its weight should reach more than 250g. In artificial breeding, the parent turtle should be strong and weigh more than 300g. The identification of male and female turtles is mostly judged from their appearance. Generally, the belly armor of turtles is very plump and the individual is very large, which is generally female, while the belly armor is flat and mostly male.

The posterior edge of the orifice of female turtles did not exceed the posterior edge of the carapace, while the posterior edge of the orifice of male turtles exceeded the posterior edge of the carapace. The mating season of chickpeas is generally in autumn, and the surrounding temperature should be 20-25 ℃. The spawning time is from May to July of the second year, and the spawning times are 2-4 times. The color of eggs is white, the color of the head part of eggs is opaque, and the color of the small head is translucent.