Trial operations have officially begun today!
Sources: https://m.weibo.cn/status/4685712307258153 and https://m.weibo.cn/status/4685641058880660 and https://m.weibo.cn/status/4673655570959950 and https://mp.weixin.qq.com/s/oowbck2_F4_zpzC4Ot9-SA and https://mp.weixin.qq.com/s/WWX2tjepWDQdG1R0WrLQ1A