Chinese stocks sank Tuesday after April economic activity weakened and other major Asian markets were little-changed, AP reported. The Shanghai Composite Index fell 0.7 percent to 3,068.24 points and Hong Kong's Hang Seng lost 0.5 percent to 25,238.96. Tokyo's Nikkei 225 gained 0.2 percent to 19,904.17 and Seoul's Kospi added 0.1 percent to 2,293.70. Sydney's S&P-ASX 200 was unchanged at 5,839.90. Benchmarks in New Zealand, and Singapore declined, while Malaysia and the Philippines gained. Benchmark U.S. crude gained 20 cents to $49.05 per barrel in electronic trading on the New York Mercantile Exchange. The contract soared $1.01 on Monday to close at $48.85. Brent crude, used to price international oils, added 21 cents to $52.03 in London. It gained 98 cents on Monday. The dollar declined to 113.51 yen from Monday's 113.79 yen. The euro edged up to $1.0987 from $1.0975.