Some remarks on X(6900)

The analysis of the LHCb data on begin{document}$X(6900)$end{document} found in the di-begin{document}$J/psi$end{document} system was performed using a momentum-dependent Flatté-like parameterization. The use of the pole counting rule and spectral density function sum rule provides consistent evidence that both confining and molecular states are possible. Alternatively, the nature of begin{document}$X(6900)$end{document} cannot be distinguished if only the di-begin{document}$J/psi$end{document} experimental data with current statistics are available. Nevertheless, we found that the lowest state in the di-begin{document}$J/psi$end{document} system likely has the same quantum numbers as begin{document}$X(6900)$end{document}, and begin{document}$X(6900)$end{document} is probably not interpreted as a begin{document}$J/psi-psi(2S)$end{document} molecular state.