diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..3e2851b
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,25 @@
+language: r
+r:
+  - oldrel
+  - release
+  - devel
+cache:
+  packages: yes
+  directories:
+    - $HOME/cache
+r_packages: 
+  - devtools
+  - testthat
+  - ggmap
+  - RgoogleMaps
+  - png
+  - RCurl
+  - rjson
+  - XML
+
+before_script:
+  - Rscript -e "if (!require('webshot')) devtools::install_github('wch/webshot')"
+  
+# run tests
+script:
+  - Rscript -e "testthat::test_dir('tests')"
\ No newline at end of file
diff --git a/DESCRIPTION b/DESCRIPTION
index 26e4ec6..cdcf348 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,6 +1,6 @@
 Package: baidumap
 Title: A package for spatial visualization with Baidu
-Version: 0.2
+Version: 0.2.1
 Encoding: UTF-8
 Author: yalei Du <yaleidu@163.com>
 Maintainer: yalei Du <yaleidu@163.com>
diff --git a/R/geoconv.R b/R/geoconv.R
index 9cd2ed6..010cbdc 100644
--- a/R/geoconv.R
+++ b/R/geoconv.R
@@ -7,7 +7,12 @@
 #' @importFrom rjson fromJSON
 #' @importFrom RCurl getURL
 #' @export geoconv
-geoconv = function(geocode, from=3, to=5){
+geoconv = function(geocode, from=3, to=5, map_ak=''){
+    if (map_ak == '' && is.null(getOption('baidumap.key'))){
+        stop('Please register AK by ')
+    }else{
+        map_ak = ifelse(map_ak == '', getOption('baidumap.key'), map_ak)
+    }
     if (class(geocode) %in% c('data.frame', 'matrix')){
         geocode = as.matrix(geocode)
         code = apply(geocode, 1, function(x) paste0(x[1], ',', x[2]))
diff --git a/R/getCoordinate.R b/R/getCoordinate.R
index 489fc33..8779e4b 100644
--- a/R/getCoordinate.R
+++ b/R/getCoordinate.R
@@ -1,4 +1,11 @@
-getCoordinate.core = function(address, city=NULL, output='json', formatted = F){
+getCoordinate.core = function(address, city=NULL, 
+                              output='json', formatted = F,
+                              map_ak = ''){
+    if (map_ak == '' && is.null(getOption('baidumap.key'))){
+        stop('Please register AK by ')
+    }else{
+        map_ak = ifelse(map_ak == '', getOption('baidumap.key'), map_ak)
+    }
     ### address
     if (grepl(' |#', address)) warning('address should have blank character!')
     address = gsub(' |#', '', address)
diff --git a/R/getLocation.R b/R/getLocation.R
index 65f5582..d4909b8 100644
--- a/R/getLocation.R
+++ b/R/getLocation.R
@@ -1,6 +1,5 @@
-map_ak = 'wwZFCIqxIqjRGMVsZ0qgTh7D'
-
-getLocation.core = function(location, output='json', formatted = F, pois=0){    
+getLocation.core = function(location, output='json', formatted = F, 
+                            pois=0, map_ak){    
     ##### URL
     if (!class(location) %in% c('matrix', 'data.frame')){
         location = matrix(location, ncol=2, byrow=T)
@@ -62,10 +61,15 @@ getLocation.core = function(location, output='json', formatted = F, pois=0){
 #' location = getLocation(loc, formatted = T) 
 #' }
 #' 
-getLocation=
-    function (location, output = "json", formatted = F, pois = 0,limit=600) {
+getLocation = function (location, output = "json", formatted = F, 
+                        pois = 0, limit=600, map_ak = '') {
+        if (map_ak == '' && is.null(getOption('baidumap.key'))){
+            stop('Please register AK by ')
+        }else{
+            map_ak = ifelse(map_ak == '', getOption('baidumap.key'), map_ak)
+        }
         if(NROW(location)<limit){
-            res<-getLocation.core(location, output, formatted , pois)
+            res<-getLocation.core(location, output, formatted , pois, map_ak = map_ak)
         }else if(require(parallel)){
             cl <- makeCluster(getOption("cl.cores", detectCores()*0.8))
             res<-parApply(cl,X = location,MARGIN = 1,FUN = function(x){
diff --git a/R/getPlace.R b/R/getPlace.R
index 6074fb9..a1cfb2d 100644
--- a/R/getPlace.R
+++ b/R/getPlace.R
@@ -29,7 +29,12 @@ url_character = function(x){
 #' sh_mcdonald = getPlace('麦当劳', '上海')
 #' }
 getPlace = function(place=NULL, city='北京', page_size=20, 
-                    pages=Inf, scope=1, verbose=TRUE){
+                    pages=Inf, scope=1, verbose=TRUE, map_ak=''){
+    if (map_ak == '' && is.null(getOption('baidumap.key'))){
+        stop('Please register AK by ')
+    }else{
+        map_ak = ifelse(map_ak == '', getOption('baidumap.key'), map_ak)
+    }
     ### character
     place = url_character(place)
     city = url_character(city)
diff --git a/R/getRoute.R b/R/getRoute.R
index ffbb707..ecd3906 100644
--- a/R/getRoute.R
+++ b/R/getRoute.R
@@ -33,7 +33,13 @@ getRouteXML = function(origin, destination, mode='driving',
                        destination_region = NA, 
                        tactics = 11, 
                        coord_type = 'bd09ll',
-                       output = 'xml'){
+                       output = 'xml',
+                       map_ak=''){
+    if (map_ak == '' && is.null(getOption('baidumap.key'))){
+        stop('Please register AK by ')
+    }else{
+        map_ak = ifelse(map_ak == '', getOption('baidumap.key'), map_ak)
+    }
     if (is.na(region)){
         if (is.na(origin_region) & is.na(destination_region)) {
             stop('Argument "region" is not setted!')
diff --git a/R/onLoad.R b/R/onLoad.R
new file mode 100644
index 0000000..302d56f
--- /dev/null
+++ b/R/onLoad.R
@@ -0,0 +1,9 @@
+.onAttach <- function(libname, pkgname) {
+    # Runs when attached to search() path such as by library() or require()
+    if (interactive()) {
+        v = packageVersion("baidumap")
+        message('baidumap ', v)
+        message('Apply an application from here: http://lbsyun.baidu.com/apiconsole/key')
+        message("Then register you key by running `options(baidumap.key = 'xxx')`")
+    }
+}
\ No newline at end of file
diff --git a/README.md b/README.md
index d89e47d..5f9603a 100644
--- a/README.md
+++ b/README.md
@@ -3,13 +3,21 @@ baidumap
 
 R interface of baidu map api，just like ggmap but get map from baidu api instead of google or openstreet.
 
-### install
+## Installation
 ```
 library(devtools)
 install_github('badbye/baidumap')
+```
+
+## Usage
+
+Apply an application from [lbsyun.baidu.com](http://lbsyun.baidu.com/apiconsole/key). Then register you key here.
+```
 library(baidumap)
+options(baidumap.key = 'XXX fill your key here XXX')
 ```
 
+
 ### getLocation
 Get location from coordinates data.
 ```
diff --git a/tests/test.R b/tests/test.R
new file mode 100644
index 0000000..e69de29