``` javascript
sh.addShardToZone("<shard-name>", "10x")
sh.updateZoneKeyRange("<dbName.collName>", {"_id" : ObjectId()}, {"_id" : MaxKey}, "10x")
use config
var zone = db.tags.findOne({"ns" : "<dbName.collName>", "max" : {"<shardKey>" : MaxKey}})
zone.min.<shardKey> = ObjectId()
db.tags.save(zone)
```