In Hong Kong, however, the benchmark Hang Seng Index ended 335 points, or 1.5 percent, higher for the day at 23,294 on turnover of HK$214.32 billion and was 0.9 percent up for the week.
The tech index rose 10 points, or 0.3 percent, to 3,754, although the gauge still hovered near its lowest in two years.
“At valuations of 10-11 times price-to-earnings after accounting for new AI investment, we think some stocks are increasingly treating the spending peak as a permanent earnings burden, while assigning limited value to a normalisation of future cash flows or successful AI monetisation,” said Kenneth Fong, head of China internet research at UBS.
Financials led gains, up 1.3 percent, while mainland property developers rose 2.8 percent.
The China enterprises index put on 106 points, or 1.4 percent, to end at 7,862.
Across the border, the Shanghai Composite Index lost 52 points, or 1.44 percent, to close at 3,599 on turnover of 764.22 billion yuan while the blue-chip CSI300 Index fell 1.4 percent to close near a one-year low.
The CSI300 Index was down 8.5 percent for the month, its biggest monthly loss in more than a decade.
Over the last 12 weeks, it has lost 15 percent, the longest losing streak on record.
The Shenzhen Component Index fell 304 points, or 2.73 percent, to 10,833 on turnover of 910.23 billion yuan while the ChiNext Index plunged 103 points, or 4.13 percent, to 2,413 on turnover of 452.21 billion yuan.
AI-related shares led declines after a selloff in US technology stocks reignited concerns about the returns on heavy AI spending.
Shares in Google parent Alphabet, Amazon.com and Intel all fell on AI cash burn.
Memory chip giant SK Hynix fell more than seven percent.
CSI 5G communications, a gauge that measures the industry, slumped 6.2 percent.
Shares of Chinese optical module producer Eoptolink Tech tumbled 14 percent and were down 50 percent this month.
Against broad declines, consumer staple shares rose two percent as investors rotated into less risky sectors.
In Tokyo, the Nikkei fell 1,369 points, or 2.12 percent, to close at 63,290 for the day, led lower by chip-equipment heavyweights Advantest and Tokyo Electron.
For the week, the benchmark managed to gain one percent.
The broader Topix was down a milder one percent on Friday but flat for the week.
In Seoul, the Kospi closed down 206 points, or 3.48 percent, at 5,730 for the day and 16.2 percent for the month, after diving up to 5.7 percent earlier and triggering a sidecar trading curb. (Reuters/Xinhua)
