There are generally two situations for a free agent: one is that he does not have a contract with him, so that the player can sign a contract with the team at will without being bound by the team; The second is a restricted free agent, usually a player whose contract expires. Once the old club offers the same price as the player, then the player will give priority to his old club.
Free agents can also sign contracts in two ways:
One is to sign directly during the season. Generally speaking, such players have poor personal ability and can only be used as substitutes or trading weights, but the advantage is that such players will reply immediately whether you sign or not.
The second is the off-season after the end of the season, and many players' contracts expire. If a player wants to sign such a player, he will enter the off-season after the finals and be ready to look for it. When they are found, they will contact the players. It should be noted that this kind of player will not reply to you until 13 days later, during which the two sides can coordinate and choose each other on the salary issue.