This page explains how Jiufeng Zhao (USATT# 223669)'s rating went from 2176 to 2156 at the 888 Table Tennis Winterfest Tournament held on 3 Dec 2021 - 5 Dec 2021. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.