chi_* language selected but no Chinese characters are recognized.

[林博仁]

I unable to extract a document with Chinese characters properly, please help.
Input File
https://drive.google.com/file/d/16j21iuXVwrxplGGtJZhxeTf0ziXPYD0d/view?usp=sharing
It's a scanned TIFF in 600DPI, it is generated using the EPSON's iscan utility
Tesseract Commandline
tesseract input.tiff output.txt -l chi_tra+eng
Expected Behavior
Chinese characters are recognized in output.txt
Current Behavior
Only English characters are recognized, Chinese characters are missing with blank substituted, like this

Tesseract Source
```````````````````
commit 000d027a9f40e17c9a90a907fa9e4a16616e61a0
Author: Egor Pugin <egor....@gmail.com>
Date:   Fri Jan 5 18:51:35 2018 +0300

    Rename tesseract library.
```````````````````

`````````````````
tesseract 4.00.00alpha
 leptonica-1.74.4
  libgif 5.1.4 : libjpeg 8d (libjpeg-turbo 1.4.2) : libpng 1.2.54 : libtiff 4.0.6 : zlib 1.2.8 : libwebp 0.4.4 : libopenjp2 2.1.0

 Found AVX
 Found SSE
`````````````````
Operating System
KDE neon 5.11 (based on Ubuntu 16.04)

tessdata
commit f1d1268 from tessdata_best

[ShreeDevi Kumar]

Have you tried with chi_sim which has both chinese and english?

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[林博仁]

I used chi_tra because the document is in Traditional Chinese.

shree於 2018年1月7日星期日 UTC+8下午2時55分13秒寫道：

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