HONG KONG (Reuters) - Tencent Holdings posted a better-than-expected 35% rise in quarterly net profit on Wednesday as growth in its gaming business resumed after a long regulatory freeze in China and its fintech operations saw revenues rise sharply. However, the world's largest gaming firm by revenue also reported a slowdown in online advertising revenue growth and said business conditions were likely to remain tough amid a slowing Chinese economy and Sino-U.S. trade tensions. "We expect the..