Dear ROS users, I am a member of NuBot team, a RoboCup Middle Size League(https://en.wikipedia.org/wiki/RoboCup_Middle_Size_League ), participating team. We have built a simulation system based on ROS ang Gazebo to research into multi-robot cooperation strategies. Although it mainly focuses on soccer robots, it could be modified for other purposes as well. If you are interested, please check out this repository: single_nubot_gazebo(https://github.com/nubot-nudt/single_nubot_gazebo ). There is a simulation competition based on this, check out simatch(https://github.com/nubot-nudt/simatch ). If you have any questions or you would like to contribute to this, please don't hesitate to contact us. Weijia Yao, NuBot team