Why is there no world cultural heritage in Liaoning Province?

There are the following Koryo Palace, Imperial City, Noble Tombs, Jiumenkou Water Great Wall, Shenyang Forbidden City and Shengjing Sanling.

1, Brief Introduction of Liaoning Province

Referred to as "Liao" for short, Shenyang, the provincial capital, governs 14 prefecture-level cities, including 2 sub-provincial cities (Shenyang and Dalian). It is located in the southeast of China, bordering the Yellow Sea and Bohai Sea in the south, separated from North Korea by a river in the east, and across the sea from Japan and South Korea. It is the only coastal and border province in northeast China.

2. Dietary characteristics in Liaoning Province

Cold noodles are all kinds of pasta, barbecue and seafood.