Are there multiple js files in the directory packaged by NCC?

Are there multiple js files in the directory packaged by NCC?

const pinyins = await nccwpck_require.e(/* import() */ 346).then(nccwpck_require.t.bind(nccwpck_require, 4346, 23));

index.js 346.index.js ​ Can anyone tell me why this is?