We got to witness a dirty legal battle between two Chinese giants, after the head of Lenovo's smartphone division, Chang Cheng, joined his rival Xiaomi as vice president. Chang has been with Lenovo since 2000 and has worked on iconic projects like the first Yoga tablet, the Z5 and Z6 smartphones, and even the ZUK division, which have made flagship products affordable. He later led Lenovo's smartphone unit in China. He is known for promoting his products on Weibo and frequently interacting with fans. On December 31, 2019, he wrote: "Everything you love will most likely be lost. But in the end, love will return in a different way," before announcing his resignation from Lenovo citing personal family reasons. Just two days later, Xiaomi's Lei Jun posted a group photo with Chang and the other co-founders, formalizing the move and revealing his role as vice president, overseeing mobile phone product planning. Xiaomi saw its market share drop to 9% in China in the third quarter of 2019, according to Canalys. This is still far more than Lenovo's market share of less than 1% since 2017." He has a deep understanding of the industry and a wealth of operating experience in the field of consumer electronics. I believe that under his leadership , our mobile phone product planning will be more progressive and closer to the needs of users and provide stronger support for the mobile phone industry," Lei Jun said of the new hire. However, this change came with its fair share of controversy, as Lenovo says Chang's move was not allowed under his contract. All executives must sign a non-compete agreement, preventing them from joining rival companies. Sources close to Xiaomi defended the decision, saying that it had not received any compensation. Lenovo will take legal action if the terms are violated. Whatever it is, it remains to be seen what products it will be working on.