Alibaba AI-cloud re-rating engine: AI demand through Alibaba Cloud substrate into mix, margin and re-rating AI compute demand training inference agentic / MaaS Qwen MaaS model gateway compute pool CPU + accelerators T-Head Zhenwu proprietary silicon Alibaba Cloud consumption path AI mix share AI run-rate rising 35% of external cloud Cloud margin EBITDA 20%+ target long-run aspiration Forward-multiple re-rating 13x fwd / 29x trailing licensed by the bridge margin bridge stalls run-rate or cloud growth decelerates