Smartisan-backed messaging service Liaotianbao, an updated version of the once-popular Bullet Messenger, has fallen victim to a major software bug, erroneously awarding users millions of RMB in virtual coins.

On Tuesday, users began posting on social media about how they were able to collect large amounts of virtual coins, which can be exchanged for cash, in an in-app game dubbed “Money Tree.” The first report came from a user on microblogging platform Weibo, saying they were awarded more than 1.6 billion coins—worth nearly RMB 1 million (around $150,000)—after playing the game once.

The user urged Kuairu Technologies, Liantianbao’s developer, as well as its struggling backer Luo Yonghao, founder of smartphone maker Smartisan, to “cope with the setbacks and bring better products to users.”

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Jill Shen

Jill Shen is Shanghai-based technology reporter. She covers Chinese mobility, autonomous vehicles, and electric cars. Connect with her via e-mail: jill.shen@technode.com or Twitter: @yushan_shen