* MSCI ex-Japan drift away recent 2-1/2-year peak
* U.S.-China trade tensions in focus
* China's Caixin shows sustained services sector recovery
* Wall Street climbs on defensive share gains
* Dollar gives back gains
By Swati Pandey
SYDNEY, Sept 3 (Reuters) - Asian equities pared early gains on Thursday amid growing worries about Sino-U.S. relations while the euro hit a one-week low as traders wagered on central bank action to tame the single currency.
In early European trade, the pan-region Euro Stoxx 50 futures and German DAX futures added 0.6% each, FTSE futures climbed 0.2% while France's CAC 40 futures rose 0.4%.
U.S. stock futures, the S&P 500 e-minis, faltered 0.3%.
MSCI's broadest index of Asia-Pacific shares outside of Japan, which was up more than 0.5% earlier in the session, slipped 0.1% with Chinese and Hong Kong shares leading the losses.
The Hang Seng fell 0.7% while China's blue-chip index was 0.5% lower.
A Bloomberg news report that China was planning sweeping policy changes to its semiconductor industry to fight U.S. restrictions added fuel to ongoing concerns about deteriorating relations between the world's two biggest economies, analysts said.
Bloomberg reported, citing sources, China was planning a suite of measures to bolster research, education and financing for the chip industry as part of its five-year plan next month.
The move comes after the United States said on Wednesday it would now require senior Chinese diplomats to get State Department approval before visiting U.S. university campuses or holding cultural events with more than 50 people outside mission grounds.
Fears of a further escalation in tensions overshadowed positive data showing China's service sector activity grew for a fourth straight month in August to stay above the 50-mark.
Elsewhere, Australia's S&P/ASX 200 rose 0.9% and Japan's Nikkei added 0.9% while South Korea's KOSPI index added 1.2%.
While analysts generally expect the equity markets rally to extend further led by massive central bank stimulus, they cautioned against rising risks.
"I think we're now at a point where tactically it makes sense to be more prudent than two or three months ago as there are still a number of significant risks for investors to contend with," said Scott Berg, portfolio manager of T. Rowe Price's global growth equity strategy.
"The economic recovery remains fragile and there is still considerable uncertainty over the growth trajectory beyond the initial rebound phase," Berg said.