suggestor不支持中文吗？

想做搜索提示功能，按官方文档用了suggester，但返回的总是空值
比如一个字段用ik_max_word做analyzer，“西方的华莱士啊，不知道比你们高到哪里去了！”，分词结果

{

  "tokens": [

    {

      "token": "西方",

      "start_offset": 0,

      "end_offset": 2,

      "type": "CN_WORD",

      "position": 0

    },

    {

      "token": "华莱士",

      "start_offset": 3,

      "end_offset": 6,

      "type": "CN_WORD",

      "position": 1

    },

    {

      "token": "莱",

      "start_offset": 4,

      "end_offset": 5,

      "type": "CN_WORD",

      "position": 2

    },

    {

      "token": "士",

      "start_offset": 5,

      "end_offset": 6,

      "type": "CN_CHAR",

      "position": 3

    },

    {

      "token": "啊",

      "start_offset": 6,

      "end_offset": 7,

      "type": "CN_CHAR",

      "position": 4

    },

    {

      "token": "不知道",

      "start_offset": 8,

      "end_offset": 11,

      "type": "CN_WORD",

      "position": 5

    },

    {

      "token": "不知",

      "start_offset": 8,

      "end_offset": 10,

      "type": "CN_WORD",

      "position": 6

    },

    {

      "token": "知道",

      "start_offset": 9,

      "end_offset": 11,

      "type": "CN_WORD",

      "position": 7

    },

    {

      "token": "比你",

      "start_offset": 11,

      "end_offset": 13,

      "type": "CN_WORD",

      "position": 8

    },

    {

      "token": "你们",

      "start_offset": 12,

      "end_offset": 14,

      "type": "CN_WORD",

      "position": 9

    },

    {

      "token": "高",

      "start_offset": 14,

      "end_offset": 15,

      "type": "CN_CHAR",

      "position": 10

    },

    {

      "token": "到哪里",

      "start_offset": 15,

      "end_offset": 18,

      "type": "CN_WORD",

      "position": 11

    },

    {

      "token": "哪里去",

      "start_offset": 16,

      "end_offset": 19,

      "type": "CN_WORD",

      "position": 12

    },

    {

      "token": "哪里",

      "start_offset": 16,

      "end_offset": 18,

      "type": "CN_WORD",

      "position": 13

    },

    {

      "token": "里",

      "start_offset": 17,

      "end_offset": 18,

      "type": "CN_WORD",

      "position": 14

    },

    {

      "token": "去了",

      "start_offset": 18,

      "end_offset": 20,

      "type": "CN_WORD",

      "position": 15

    }

  ]

}

 然后是suggest和结果

GET my/folks/_search

{

  "size": 0, 

  "suggest": {

    "text": "东方的华莱土",

    "young": {

      "term": {

        "field": "name"

      }

    }

  }

}



"suggest": {

    "young": [

      {

        "text": "东方",

        "offset": 0,

        "length": 2,

        "options": []

      },

      {

        "text": "华",

        "offset": 3,

        "length": 1,

        "options":

      },

      {

        "text": "莱",

        "offset": 4,

        "length": 1,

        "options":

      },

      {

        "text": "土",

        "offset": 5,

        "length": 1,

        "