Character breakdown
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.
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.
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
欧
These are the forms of 歐, the traditional character: 欧 is a twentieth-century simplification, found in no ancient corpus.
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Warring States script 戰國.秦 -
Clerical script 西漢 - See all 3 forms
投
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Warring States script 戰國.秦 -
Clerical script 東漢 - See all 5 forms
资
These are the forms of 資, the traditional character: 资 is a twentieth-century simplification, found in no ancient corpus.
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Chu manuscripts 戰國.楚 -
Clerical script 東漢 - See all 6 forms
银
These are the forms of 銀, the traditional character: 银 is a twentieth-century simplification, found in no ancient corpus.
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Small seal script -
Clerical script 東漢 - See all 5 forms
行
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Oracle bone script 商 -
Clerical script 東漢 - See all 20 forms
Forms, sources and dates: the 字形演變 database of 小學堂, Academia Sinica, public domain (CC0).