Is the traffic of all enterprises in Zhilian a fraud, Zhihu?

No. Wanqi Zhilianliu is a flow card owned by Heyuan Yiran Electronic Technology Co., Ltd. Heyuan Yiran Electronic Technology Co., Ltd. was registered in Heyuan Yuancheng District Market Supervision Administration in 2020 and can be found in the Industrial and Commercial Bureau. It's a legitimate company. The traffic of Wanqi Zhilian is officially authorized by Heyuan Yiran Electronic Technology Co., Ltd., with anti-counterfeiting logo, so the traffic of Wanqi Zhilian is not fraud.