REST Interface search

[lin joinf]

i have a campaign simple info:
"campaign": {
        "resourceName": "customers/XXXXX/campaigns/13810608168",
        "name": "0707_rechargeable fan_尼日利亚 巴基斯坦 老挝 柬埔寨 越南",
        "id": "13810608XXXX"
      }

when i use REST Interface search 

--data '{
"pageSize": 10,
"query": "
   SELECT campaign.id, campaign.name,metrics.clicks, metrics.ctr FROM 
campaign   where segments.date DURING LAST_7_DAYS and 
campaign.advertising_channel_type = 'SEARCH' and campaign.name LIKE'%尼日利亚%'
"
}'
and query = "SELECT campaign.id, campaign.name,metrics.clicks, metrics.ctr 
FROM campaign   where segments.date DURING LAST_7_DAYS and 
campaign.advertising_channel_type = 'SEARCH' and campaign.name LIKE'%尼日利亚%';

*but it can not query the campaign which i create.*
*if i remove Chinese characters from query*

--data '{
"pageSize": 10,
"query": "
   SELECT campaign.id, campaign.name,metrics.clicks, metrics.ctr FROM 
campaign   where segments.date DURING LAST_7_DAYS and 
campaign.advertising_channel_type = 'SEARCH' and campaign.name LIKE'% 
0707_rechargeable fan_  %'
"
}'
then can *query the campaign which i create.*

*why?*

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