The Chinese Premier League (CFL) semifinals feature a home-and-away (HA) format, which means teams alternate between playing at home and away. The first semifinals are set to take place next month, and the maximum of 30 characters likely refers to a specific rule or characteristic of the game's format. However, this information may vary depending on the organizing body or specific regulations in the region.

In the semifinals, the key rule is the HA format, where each team plays one home game and one away game against different opponents. This ensures that teams have balanced opportunities to play at home and away, preventing any team from dominating a single location. The maximum of 30 seconds could refer to the time limit for each game, but more likely, it refers to a specific rule about the number of times a team can play at home or away. For example, some leagues allow a team to play at home twice before their first home game, while others have a maximum of two home games. These rules are crucial for maintaining fairness and balance in the tournament.

The HA format is essential for the CFL because it ensures that teams compete fairly and avoid being overrepresented at home or away. This rule also helps distribute workload evenly among teams and prevents any team from feeling overly burdened by playing at home or away. The maximum of 30 characters, as mentioned, might refer to a specific rule about the number of times a team can play home or away games, but it likely varies slightly depending on the organizing body or league rules.

The semifinals are a crucial part of the CFL tournament, as the winner of the first semifinal advances to the final. The HA format ensures that the tournament remains balanced and fair, with no single region or team dominating the competition. This rule is essential for maintaining the league's integrity and competitiveness.