TEL AVIV—Chinese investors are pouring millions into Israel-focused, tech-investment funds—as well as launching their own funds and investing directly in Israeli startups—amid a frenzy of tech investment and deal making here.

Yongjin Group Inc., a Chinese equity-investment management and financial- services company, has put between $15 million and $20 million into Israeli venture fund Pitango Venture Capital during the past year, according to people familiar with the matter.

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