diff --git a/.github/ISSUE_TEMPLATE.md b/.github/ISSUE_TEMPLATE.md
index a74199b451542bcc350d6ba708406c78c5e80eaf..d3510fbc4abf7c7889b0b39f93232d04682fda88 100644
--- a/.github/ISSUE_TEMPLATE.md
+++ b/.github/ISSUE_TEMPLATE.md
@@ -19,11 +19,12 @@ To check the option, add x in [ ], e.g.: [x] I am ...
 
 <!-- BEGINNING OF REQUIRED FIELDS 必填项开始 -->
 
-
+<!--
 PLEASE MAKE SURE OF ALL THE FOLLOWING OPTIONS IN REQUIRED FIELDS ARE TICKED (with x)!
 Otherwise, the issue will not be answered.
 And think before you tick. :)
 请确保以下每项都打上勾了！并且确保都做了这些事哦~ 这将大量简化我们的工作流程，使你的问题更快速得到解答。
+-->
 
 - [ ] Required: I have read the document and examples and tried to solve it by myself. （必填）我读过了文档和教程，并且曾试图自己解决问题。
 - [ ] Required: I have searched for similar issues and that didn't help. （必填）我搜索过 issue 但是没有帮助。
@@ -57,33 +58,35 @@ In this issue, I have provided information with: 在这个 issue 中我提供了
 
 <!-- Use one sentence to describe what you want and what's wrong. 一句话描述问题。 -->
 
-{DESCRIBE_HERE}
+<!-- DESCRIBE_HERE} -->
 
 
 ### Expected Behavior
 
 <!-- Add screenshots to demo if necessary. 期望的效果。 -->
 
-{DESCRIBE_HERE}
+<!-- {DESCRIBE_HERE} -->
 
 
 ### Current Behavior
 
 <!-- Add screenshots to demo if necessary. Otherwise, replace the following line with N/A. 现在的效果。 -->
 
-{DESCRIBE_HERE}
+<!-- {DESCRIBE_HERE} -->
 
 
 ### Online Example
 
 <!-- Please use jsfiddle.net or gallery.echartsjs.com to provide a simplest demo to show the problem. And do not upload zip demos. 请使用 gallery.echartsjs.com 提供最简单可运行的代码，请不要上传 zip 文件。 -->
+<!--
 THIS IS REQUIRED FOR ALL BUG REPORTS AND QUESTIONS!!! 如果是提问或报 bug 一定要提供这一项！
+-->
 
-{ADD_LINK_OF_DEMO_HERE}
+<!-- {ADD_LINK_OF_DEMO_HERE} -->
 
 <!-- Please make your demo as simple as possible to help locate the problem. And paste only necessary part of code here. 提供必要的代码，不要全部粘贴。 -->
 
-{PASTE_RELATED_CODE_HERE}
+<!-- {PASTE_RELATED_CODE_HERE} -->
 
 
 ## Topics
@@ -103,7 +106,7 @@ THIS IS REQUIRED FOR ALL BUG REPORTS AND QUESTIONS!!! 如果是提问或报 bug
 
 <!-- You may reference other issues here. Otherwise, replace the following line with N/A.  其他我们需要知道的东西，比如引用其他 issue。 -->
 
-{DESCRIBE_HERE}
+<!-- {DESCRIBE_HERE} -->
 
 
 ## Environment
diff --git a/src/coord/cartesian/Grid.js b/src/coord/cartesian/Grid.js
index 458a16602e22ec7a5b6ffce5b1230821877fc38a..ac45e9c0f5916d1bca4c26b7a260fb1220480372 100644
--- a/src/coord/cartesian/Grid.js
+++ b/src/coord/cartesian/Grid.js
@@ -62,7 +62,7 @@ function Grid(gridModel, ecModel, api) {
     this._coordsList = [];
 
     /**
-     * @type {Object.<string, module:echarts/coord/cartesian/Axis2D>}
+     * @type {Object.<string, Array.<module:echarts/coord/cartesian/Axis2D>>}
      * @private
      */
     this._axesMap = {};
@@ -423,9 +423,7 @@ gridProto._initCartesian = function (gridModel, ecModel, api) {
                 if (axisPosition !== 'top' && axisPosition !== 'bottom') {
                     // Default bottom of X
                     axisPosition = 'bottom';
-                    if (axisPositionUsed[axisPosition]) {
-                        axisPosition = axisPosition === 'top' ? 'bottom' : 'top';
-                    }
+                    axisPosition = axisPositionUsed[axisPosition] ? 'top' : 'bottom';
                 }
             }
             else {
@@ -433,9 +431,7 @@ gridProto._initCartesian = function (gridModel, ecModel, api) {
                 if (axisPosition !== 'left' && axisPosition !== 'right') {
                     // Default left of Y
                     axisPosition = 'left';
-                    if (axisPositionUsed[axisPosition]) {
-                        axisPosition = axisPosition === 'left' ? 'right' : 'left';
-                    }
+                    axisPosition = axisPositionUsed[axisPosition] ? 'right' : 'left';
                 }
             }
             axisPositionUsed[axisPosition] = true;
diff --git a/src/echarts.js b/src/echarts.js
index c5058267f69a673240f28b8860d0fb9508c950f3..c3146c5344e6013d589754575a19d7f1e9bd8419 100644
--- a/src/echarts.js
+++ b/src/echarts.js
@@ -1936,7 +1936,7 @@ function enableConnect(chart) {
  * @param {Object} [theme]
  * @param {Object} opts
  * @param {number} [opts.devicePixelRatio] Use window.devicePixelRatio by default
- * @param {string} [opts.renderer] Currently only 'canvas' is supported.
+ * @param {string} [opts.renderer] Can choose 'canvas' or 'svg' to render the chart.
  * @param {number} [opts.width] Use clientWidth of the input `dom` by default.
  *                              Can be 'auto' (the same as null/undefined)
  * @param {number} [opts.height] Use clientHeight of the input `dom` by default.