no placeholder, the current value is : gd
with placeholder
without title
set value=广西
readonly, displays just like a cell
广东
use plain options
boolean selector: true
set valueMap for directly using API data
[
  {
    "idValue": "key01",
    "idLabel": "value01",
    "otherProp": "prop01"
  },
  {
    "idValue": "key02",
    "idLabel": "value02",
    "otherProp": "prop02"
  }
]

key01