Copy the object algebra example
Copy the object algebra example

hkuplg/fcore,bixuanzju/fcore,wxzh/fcore,zhiyuanshi/fcore,zhiyuanshi/fcore,xnning/fcore,wxzh/fcore,zhiyuanshi/fcore,xnning/fcore,wxzh/fcore,xnning/fcore,bixuanzju/fcore,bixuanzju/fcore,hkuplg/fcore,hkuplg/fcore