2. As shown in Figure 6, the line $y=$ $-2 x+10$ intersects the $x$-axis and $y$-axis at points $A$ and $B$, respectively. If $\triangle A O B$ is folded along $A B$, point $O$ lands at point $C$. The coordinates of point $C$ are $\qquad$
(1999, Huanggang City, Hubei Province, Junior High School Mathematics Competition)
(Answer: $C(8,4)$ )