Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| # | Name | Hanzi | Hanyu Pinyin | Population (2010 Census) | Area (km²) | Density (/km²) |
| --- | --- | --- | --- | --- | --- | --- |
| City Proper | City Proper | City Proper | City Proper | City Proper | City Proper | City Proper |
| 1 | Jianghai District | 江海区 | Jiānghǎi Qū | 254,365 | 107 | 2,377.24 |
| 2 | Pengjiang District | 蓬江区 | Péngjiāng Qū | 719,120 | 325 | 2,212.67 |
| 3 | Xinhui District | 新会区 | Xīnhuì Qū | 849,155 | 1,260 | 673.93 |
| Satellite cities | Satellite cities | Satellite cities | Satellite cities | Satellite cities | Satellite cities | Satellite cities |
| 4 | Enping | 恩平市 | Ēnpíng Shì | 492,814 | 1,698 | 290.23 |
| 5 | Taishan | 台山市 | Táishān Shì | 941,087 | 3,286 | 286.39 |
| 6 | Kaiping | 开平市 | Kāipíng Shì | 697,395 | 1,659 | 420.37 |
| 7 | Heshan | 鹤山市 | Hèshān Shì | 494,935 | 1,108 | 446.69 |
Question:
what city proper has the smallest area in km2?
Answer:
Jianghai District