(The following are the original words of iameric, please don't copy them! )
I reasoned like this:
First of all, according to China Youth Network Encyclopedia, "Shu Road refers to the road from Shaanxi to Gansu to Sichuan". B, C and D can be excluded first (Luoyang is in Henan, Chengdu and Chongqing are in Sichuan);
Then iameric found the statement of Xinhuanet Sichuan: "Jinniu Road is an important part of the Qin-Shu plank road, which goes south from Mianxian County, Shaanxi Province, passes through Qipanling (now Qipanguan), enters Sichuan, and leads to Chengdu through Chaotiangang and Jianmenguan ...", thus excluding the item containing "Chongqing".
But maybe Shu Dao will re-enter Chongqing via Chengdu? The idea was quickly rejected. An article in Pakistan Weekly said that "Chengdu is the end and destination of Shu Dao", and this article also pointed out that "Shu Dao has nothing to do with Chongqing".
Therefore, iameric thinks that the most appropriate answer to this question is "Xi and Chengdu".
References:
China youth network Encyclopedia:
Et.com/encyclopedia/astro/tourism/Sichuan/991125050.htm.
Xinhuanet Sichuan:
/misc/2002- 12/ 18/content _ 96893 . htm
Pakistan Weekly:
/page/buyi.htm
China Map Network:
/map world/China map/ Xing Zheng/Shanxi 2.jpg
/map world/China map/ Xing Zheng/Sichuan.jpg
(The above are the original words of iameric, please don't copy them! )