diff --git a/R/data.R b/R/data.R
index 78f3cd0..6244692 100644
--- a/R/data.R
+++ b/R/data.R
@@ -1,28 +1,40 @@
-#' province
+#' province data for China
 #' @description
-#' province data for china
-#' source: http://datav.aliyun.com/tools/atlas/
+#' This dataset contains spatial (sf) data for provinces in China, including various attributes related to each province.
+#' @source http://datav.aliyun.com/tools/atlas/
 #'
 #' \describe{
-#'   \item{name}{province name}
-#'   \item{adcode}{adcode}
-#'   ...
+#'   \item{name}{The name of the province }
+#'   \item{adcode}{The administrative code for the province, a unique identifier (e.g., "110000")}
+#'   \item{childrenNum}{The number of administrative divisions (e.g., counties) within the province}
+#'   \item{level}{The administrative level of the area, which is generally "province" for the entries in this dataset}
+#'   \item{subFeatureIndex}{An index representing the sub-features within the province}
+#'   \item{centroid}{The geographical centroid of the province, represented as a string of coordinates }
+#'   \item{center}{The center point of the province, also represented as a string of coordinates}
+#'   \item{parent}{A JSON string representing the parent administrative entity, usually the country-level data}
+#'   \item{acroutes}{A JSON array of administrative codes that represent the administrative hierarchy leading to the province}
+#'   \item{geometry}{Spatial geometry of the province, stored as an sf object in MULTIPOLYGON format}
 #' }
 
 
 "china_province"
 
-
-#' city
+#' city data for China
 #' @description
-#' city data for china
-#' source: http://datav.aliyun.com/tools/atlas/
+#' This dataset contains spatial (sf) data for city in China, with various attributes specific to each district.
+#' @source http://datav.aliyun.com/tools/atlas/
 #'
 #' \describe{
-#'   \item{name}{city name}
-#'   \item{adcode}{adcode}
-#'   ...
+#'   \item{name}{The name of the district }
+#'   \item{adcode}{The administrative code for the district, a unique identifier (e.g., "110101")}
+#'   \item{childrenNum}{The number of lower-level administrative divisions within the district (usually 0 for districts)}
+#'   \item{level}{The administrative level of the area, which is "district" for all entries in this dataset}
+#'   \item{subFeatureIndex}{An index representing the sub-features within the district}
+#'   \item{centroid}{The geographical centroid of the district, represented as a string of coordinates }
+#'   \item{center}{The center point of the district, also represented as a string of coordinates}
+#'   \item{parent}{A JSON string representing the parent administrative entity, usually the province-level data}
+#'   \item{acroutes}{A JSON array of administrative codes that represent the full administrative hierarchy leading to the district}
+#'   \item{geometry}{Spatial geometry of the district, stored as an sf object in MULTIPOLYGON format}
 #' }
 
-
 "china_city"