Hello, it's in both Chinese and English.
Parts of the datasheet are in English, but I wasn't able to find any information about which pole is the anode and which is the cathode.
On page 4 of the decimal point's datasheet, there's a string of four diode symbols. Above the diodes, there's a Chinese-language phrase which roughly translates as"the coloured pole is positive."I wasn't able to find this information anywhere in the English-language text.
This is particularly problematic, because the datasheet states the maximum allowable reverse voltage is 5v, which is less than the forward voltage. This makes it impossible to test the polarity without violating the Absolute Maximum ratings. (I suspect the 5v reverse voltage must be per diode, or 20v for a string of four. However, the forward voltage is specified for the whole string, so it's really not clear.)
I see what you mean.
There's"the coloured pole is positive"in Chinese. So don't worry about it, the pole with a red dot is positive.
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