In the Chinese environment, how to use term query?

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1

this is a test about term query ,but result is no ideal

PUT /abc
{
  "mapping": {
    "abc": {
      "properties": {
        "str2": {
          "type": "string",
          "index":"not_analyzed"
        }
      }
    }
  },
  "settings": {
    "number_of_replicas": 1,
    "number_of_shards": 1
  }
}

POST /abc/abc/1?pretty 
{
  "str1": "hello, world!",
  "str2": "goodbye! 你好"
}
POST /abc/abc/2?pretty 
{
  "str1": "hello",
  "str2": "你好"
} 

POST /abc/abc/3?pretty 
{
  "str1": "hello",
  "str2": "goodbye"
}

###query one:

GET /abc/_search
{
  "query": {
    "term": {
      "str2": {
        "value": "goodbye"
      }
    }
    
  }
}

###result:

{
  "took": 1,
  "timed_out": false,
  "_shards": {
    "total": 1,
    "successful": 1,
    "failed": 0
  },
  "hits": {
    "total": 2,
    "max_score": 0.59086174,
    "hits": [
      {
        "_index": "abc",
        "_type": "abc",
        "_id": "3",
        "_score": 0.59086174,
        "_source": {
          "str1": "hello",
          "str2": "goodbye"
        }
      },
      {
        "_index": "abc",
        "_type": "abc",
        "_id": "1",
        "_score": 0.33355096,
        "_source": {
          "str1": "hello, world!",
          "str2": "goodbye! 你好"
        }
      }
    ]
  }
}

Result is right, but query two...

query two:

GET /abc/_search
{
  "query": {
    "term": {
      "str2": {
        "value": "你好"
      }
    }
    
  }
}

###result:

{
  "took": 1,
  "timed_out": false,
  "_shards": {
    "total": 1,
    "successful": 1,
    "failed": 0
  },
  "hits": {
    "total": 0,
    "max_score": null,
    "hits": []
  }
}

while term's value is Chinese , no result ? this is why ?
str2 is not_analyzed

2 
PUT /abc
{
  "mapping": {
    "abc": {
      "properties": {
        "str2": {
          "type": "keyword"
        }
      }
    }
  },
  "settings": {
    "number_of_replicas": 1,
    "number_of_shards": 1
  }
}

POST /abc/abc/1?pretty 
{
  "str2": "goodbye! 你好"
}
POST /abc/abc/2?pretty 
{
  "str2": "你好"
} 

POST /abc/abc/3?pretty 
{
  "str2": "goodbye"
} 
 

GET /abc/_search
{
  "query": {
    "term": {
      "str2": {
        "value": "你好"
      }
    }
    
  }
}

this the query is also no result!

3

This forum is manned by volunteers, so please show some patience and do not send direct messages.

4

sorry，I try so hard to solve the problem

5

str2 is mapped as not_analyzed, so is not broken up into tokens. If you change the mapping to analysed you will be able to search for parts of the string.

6

I see , I just need to fully match ， query two ， result is no ideal.

7

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