According to the promotion and demotion rules of the Chinese Super League, the last two teams in the standings will be relegated at the end of the season. The downgrade score depends on the situation, and there is no fixed or standard answer.
Super league system
The Super League has a double cycle of home and away games, with 240 games in 30 rounds throughout the season, and a "two-up and two-down" relegation system, that is, the two teams ranked last in the season are relegated to the Chinese League next season, and the top two teams in the Chinese League are promoted to the Chinese League next season.
Each team wins a game with 3 points, draws a game 1 point, and loses a game with 0 points. When the Super League completed all the annual competitions, the points ranked first. If two or more teams score equally.
Teams with equal points compete with each other, and teams with equal points compete with each other for goal difference. Teams with equal points compete for goal difference, and teams with equal points compete for goal difference. The reserve team of their club ranks the same with the former in this season's reserve league, and the teams with equal points rank the same with goal difference in all the games of the Super League that year.
Teams with equal points ranked first in all competitions of the Super League that year. The person with the highest score in fair competition ranks first (red and yellow cards are deducted, each yellow card is deducted 1 point, and each red card is deducted 3 points), and the ranking is decided by drawing lots. During the Super League season, the team with the highest points ranked first, and the teams with equal points ranked the same.
Refer to the above? Baidu Encyclopedia-Chinese Football Association Super League