& 0 \\ 
0 & a_{1}^{[i]} & 0 & \cdots  & 0 \\ 
0 & 0 & a_{2}^{[i]} & \cdots  & 0 \\ 
\vdots  & \vdots  & \vdots  & \ddots  & 0 \\ 
0 & 0 & 0 & 0 & a_{p-1}^{[i]}\end{array}\right] ,|i|=0;  \notag  \label{block} \\
A^{[i]} &=&\left[ 
\begin{array}{ccccc}
0 & a_{0}^{[i]} & 0 & \cdots  & 0 \\ 
0 & 0 & a_{1}^{[i]} & \cdots  & 0 \\ 
0 & 0 & 0 & \cdots  & 0 \\ 
\vdots  & \vdots  & \vdots  & \ddots  & \vdots  \\ 
a_{p-1}^{[i]} & 0 & 0 & 0 & 0\end{array}\right] ,|i|=1;  \notag \\
&\vdots &\quad   \notag \\
A^{[i]} &=&\left[ 
\begin{array}{ccccc}
0 & 0 & 0 & \cdots  & a_{0}^{[i]} \\ 
a_{1}^{[i]} & 0 & 0 & \cdots  & 0 \\ 
0 & a_{2}^{[i]} & 0 & \cdots  & 0 \\ 
\vdots  & \vdots  & \vdots  & \ddots  & \vdots  \\ 
0 & 0 & 0 & a_{p-1}^{[i]} & 0\end{array}\right] ,|i|=p-1,\end{aligned}$$where $a_{r}^{[i]}$ with $r\in \mathbb{Z}_{p}$ are matrices in the sub-blocks with smaller virtual dimensions. Actually the structures of the local matrices are determined by the fact that the Fock space is a graded vector space. Moreover, the charges of the local matrices can 