\section{Conclusion}
In summary, we have used a parton and hadron cascade model, PACIAE, to investigate 
systematically the yield, (pseudo)rapidity distribution, and transverse momentum 
distribution of partons and anti-partons in partonic matter assumed forming in the 
early stage of $pp$ and nucleus-nucleus collisions at RHIC and LHC energies. The 
discrimination, in the yields, $\eta$ distributions, and $p_T$ distributions, between 
different parton and anti-parton, RHIC and LHC energies, as well as $pp$ and 
nucleus-nucleus collisions is discussed. We have turned out that the different parton 
and anti-parton approach to have similar spectrum with reaction energy increasing   
from RHIC to LHC. This is consistent with the fact of the (dressed) mass 
effect decreases with momentum (reaction energy/temperature) increasing. This result 
seems not supporting the assumption of different quark and anti-quark have the same 
$p_T$ distribution at RHIC energy. We have also argued that if the partonic matter 
forming in the early stage of Au+Au collisions at RHIC energy is sQGP, the one 
forming in the Pb+Pb collisions at LHC energy might approach fQGP.

The transport model results of this paper seem to support that the fQGP may properly 
have following physical features:
\begin{itemize}
\item Gluons carry more than half fraction in total momentum (energy).
\item Ratio of anti-parton to parton approaches one.
\item Flavor balance, such as \\
$u : d : s : c ... \approx$ 1 : 1 : $\gamma_s$ : $\gamma_c$ ...,\\
and $u\bar u : d\bar d : s\bar s, ... \approx$ 1 : 1 : $\gamma_s$ ...,\\
($\gamma_s\geq$ 0.3 and $\gamma_c\geq$ 10$^{-11}$ for instance) is
expected.
\end{itemize}
These physical features might shed light on the searching for fQGP.

Finally, the financial support from NSFC (10635020, 10605040, and 10705012) in China
is acknowledged

