FileStream file;
    if (File.Exists(Application.persistentDataPath + Path.DirectorySeparatorChar + "bj_allin1_data.dat"))
    {
        file = File.Open(Application.persistentDataPath + Path.DirectorySeparatorChar + "bj_allin1_data.dat", FileMode.Open);
    }
    else
    {
        file = File.Create(Application.persistentDataPath + Path.DirectorySeparatorChar + "bj_allin1_data.dat");
    }