This simulation model is made of high-quality materials, 

accurate anatomical position, 

soft and elastic skin, realistic feel, and real lesion tissue.

A reddish fluid is withdrawn by inserting the posterior fornix 1 cm below the cervicovaginal 

mucosal junction and parallel to the cervical canal (with a No. 7 puncture needle). 

The quality of the paracentesis is up to standard.

If the operator does not perform the routine puncture, such as piercing the rectum,

 yellow liquid will be withdrawn, which is a failure.

The operator did not insert the needle according to the routine operation,

 blindly pierced to both sides, and injured the surrounding organs, 

indicating that the puncture failed.