G4.4 In the coordinate plane, rotate point $A(6,8)$ about the origin $O(0,0)$ counter-clockwise for $20070^{\circ}$ to point $B(p, q)$. Find the value of $p+q$.
$\begin{array}{l}20070^{\circ}=360^{\circ} \times 55+270^{\circ} \\ \therefore B(8,-6) \\ p+q=2\end{array}$