Apple CEO Tim Cook has returned to China, and held a meeting with Apple partner China Telecom, according to a Chinese report (translated link). The visit is Cook’s second of the year, as the CEO last visited China in January. Cook is also reportedly expected to meet with executives from China Unicom and China Mobile during the trip. Other speculative reasons for the visit could include upcoming iPhone releases, and checking in on supplier Pegatron, which was recently accused of numerous labor violations in a report. During last week’s Q3 2013 financial results conference call, Cook acknowledged sales in China were weaker during the quarter, but noted he was not “discouraged” over a 90-day cycle, saying China was a “huge opportunity” for Apple. [via 9to5Mac]