Does SF Express have to transit through Zhengzhou to Xinyang?

You don't have to change trains in Zhengzhou.

SF doesn't have to transit through Zhengzhou. The reason why SF Express will transit is because the express delivery will gather together. When there are more goods, they will be delivered together, and the places close to the target area will transit. General courier companies are arranged according to the route. If you need to go through the provincial capital, you need to improve it. If not, you don't have to go through the provincial capital. For example, if it is sent to an adjacent city, it will not be sent to a further provincial capital city for transit, but will be sent directly to an adjacent city for delivery.

For example, international express delivery to Xinyang can also transit in Wuhan, not necessarily through Zhengzhou.