By querying the information of China Chess Masters Network, the order of the second round in chess match is usually decided by drawing lots or randomly generating by computer. If the first player wins in the first round, the second player holds the red side in the second round, and vice versa.
In some special cases, such as large-scale team games or tournaments, there may be other rules to determine the order of each player's hands. In official competitions, relevant rules and procedures should be followed to ensure fair competition.