public abstract class Response
{
    protected Response NextResponse;

    public abstract void Handle(int dayNum);
}

public class Director : Response
{
    public Director()
    {
        NextResponse = new Chief();
    }

    public override void Handle(int dayNum)
    {
        Console.WriteLine("主管审批同意");
        if (dayNum > 3)
        {
            NextResponse.Handle(dayNum);
        }
    }
}

public class Chief : Response
{
    public Chief()
    {
        NextResponse = new TopManager();
    }

    public override void Handle(int dayNum)
    {
        Console.WriteLine("总监审批同意");
        if (dayNum > 7)
        {
            NextResponse.Handle(dayNum);
        }
    }
}

public class TopManager : Response
{
    public override void Handle(int dayNum)
    {
        Console.WriteLine("总经理审批同意");
    }
}

Response direct = new Director();
direct.Handle(5);
Console.ReadLine();