There are historical records that suggest the consumption of baozi (包子) in the Eastern Capital during the Northern Song Dynasty (960-1127 CE). Baozi is a type of steamed bun that is often filled with meat or vegetables.

While the recipe for baozi has likely evolved over time, the basic concept of a steamed bun filled with flavorful ingredients remains the same. In modern times, baozi can be found in a wide variety of flavors, including pork, beef, chicken, vegetables, and even sweet fillings like red bean paste.

Some regional variations exist as well, such as the famous soup dumplings (xiaolongbao) of Shanghai, which are essentially baozi filled with a hot and savory soup. However, the basic idea of a steamed bun with a filling remains the same across different types of baozi.

Overall, while the exact recipe and flavor of baozi may have changed over time, the basic concept of a steamed bun filled with flavorful ingredients has remained a staple of Chinese cuisine for centuries.

There are historical records that suggest the consumption of baozi (包子) in the Eastern Capital during the Northern Song Dynasty (960-1127 CE). Baozi is a type of steamed bun that is often filled with meat or vegetables.

While the recipe for baozi has likely evolved over time, the basic concept of a steamed bun filled with flavorful ingredients remains the same. In modern times, baozi can be found in a wide variety of flavors, including pork, beef, chicken, vegetables, and even sweet fillings like red bean paste.

Some regional variations exist as well, such as the famous soup dumplings (xiaolongbao) of Shanghai, which are essentially baozi filled with a hot and savory soup. However, the basic idea of a steamed bun with a filling remains the same across different types of baozi.

Overall, while the exact recipe and flavor of baozi may have changed over time, the basic concept of a steamed bun filled with flavorful ingredients has remained a staple of Chinese cuisine for centuries.

Unfortunately, I don't have that specific information about the price of a single steamed bun (baozi) during the Northern Song Dynasty in the capital city of Kaifeng. However, it's worth noting that the value of money and prices of goods have changed significantly over time due to inflation and other economic factors, so even if we knew the exact price of a baozi during that time, it may not be directly comparable to prices today.

Additionally, the specific types of baozi available during the Northern Song Dynasty may have differed from those commonly consumed today. Traditional baozi fillings include pork, beef, chicken, and vegetable options, but there may have been other fillings available during the Northern Song period that are not as commonly used today.

Some historical records suggest that people in the Northern Song period enjoyed fillings such as lamb, beef, and venison, which were more widely available at the time due to the abundance of livestock and hunting opportunities.

Other records mention more exotic fillings, such as shark fin, bird's nest, and sea cucumber, which were considered delicacies and were likely only available to the wealthy. In addition to meat-based fillings, baozi may have also been filled with a variety of vegetables and grains, such as mung bean paste, lotus seed paste, and black sesame paste.

While some of these fillings may still be available today, they are not as commonly used as pork or vegetable fillings. Additionally, modern baozi may have different flavorings and seasonings compared to those used during the Northern Song period, due to changes in tastes and culinary traditions over time.