Photo sharing platform 500px, which had raised $22m from investors including Visual China Group and CAA, has been acquired by the former.

Amazon has agreed to pay upwards of $1.2bn for the smart doorbell maker, which counts the corporate's Alexa Fund among its investors.

Sensor technology developer Chirp will become a wholly-owned TDK subsidiary, providing exits to University of California and UC Berkeley’s Skydeck accelerator.

The online marketplace could give up its stake in e-commerce company Giosis as part of a deal where it will pay $700m for the latter's Japanese assets.

The prospective deal would involve Alibaba buying out the food delivery platform's other backers, including Baidu, Tencent and JD.com, at a $9.5bn valuation.

Robert Bosch has paid an undisclosed amount for the carpooling platform, giving InMotion Ventures its first exit.

Momo has agreed to pay $601m in cash and approximately $160m in stock, allowing YY and Bertelsmann to exit dating and meeting app Tantan.

Image editing platform Meitu has exited AR selfie and video app Faceu through an acquisition by Toutiao, its third in less than four months.

The cloud cybersecurity software producer has agreed to an acquisition by Oracle that will allow Telus and Zoho to exit.