直接插入即可，查询的时候，字段内容填写kinds.name即可，示例代码如下：
<?php
$manager = new MongoDB\Driver\Manager("mongodb://localhost:27017");
// 插入数据
$bulk = new MongoDB\Driver\BulkWrite;
$bulk->insert(['x' => 1, 'kind' => ['name' => "美容", "addr" => "美发"]]);
$_data=$manager->executeBulkWrite('test.sites2', $bulk);
$filter = ['kind.addr' => ['$eq' => '美发']];
$options = [
'projection' => ['_id' => 0],
'sort' => ['x' => -1],
];
// 查询数据
$query = new MongoDB\Driver\Query($filter, $options);
$cursor = $manager->executeQuery('test.sites2', $query);
foreach ($cursor as $document) {
print_r($document);
}
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