Stroke order
Show the animation 
Stroke data from Make Me a Hanzi, derived from the Arphic PL fonts under the Arphic Public License.
Show the animation 
Stroke data from Make Me a Hanzi, derived from the Arphic PL fonts under the Arphic Public License.
How it used to be written
开
These are the forms of 開, the traditional character: 开 is a twentieth-century simplification, found in no ancient corpus.
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Warring States script 戰國.秦 -
Clerical script 東漢 - See all 7 forms
发
These are the forms of 發, the traditional character: 发 is a twentieth-century simplification, found in no ancient corpus.
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Oracle bone script 商 -
Clerical script 西晉 - See all 19 forms
Forms, sources and dates: the 字形演變 database of 小學堂, Academia Sinica, public domain (CC0).
Examples
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为了按期完成开发，我们请求暂时推迟其他不相关的任务。
In order to complete the development on schedule, we request that other unrelated tasks be delayed for the moment.
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为了长期利益，我们决定把开发部门卖掉。
For the sake of long-term interests, we have decided to sell the development department.
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在接下来的十五年里，建筑师、计划者和社区开发企业为了把三百四十六英亩的工业荒地改变成六千五百座房子、两个购物中心、一个小艇船坞、一个学校、一个高中和公用场地都会一起工作。
Over the next fifteen years, architects, planners and community developers will work together to transform 346 acres of industrial wasteland into 6,500 homes, two shopping centres, a marina, a primary school and college, and parkland.
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我们国家必须开发自然资源。
Our country must develop its natural resources.
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我们需要开发新的能源、创造新的工作岗位，我们需要修建新学校，应对众多威胁、修复与许多国家的盟友关系。
There's new energy to harness, new jobs to be created, new schools to build, and threats to meet, alliances to repair.
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我正在开发一个安卓应用。
I'm developing an Android application.
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既然所有的任务都按时完成了，我们已经准备好开始下一阶段的开发了。
Since all tasks have been completed without delay, we are ready to start the next phase of development.
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本来以为是开发板给我弄坏了，原来是电源线接触不良。
At first I thought the development board was up the spout, but it was just a loose connection.