Hong Kong CNN — Chinese tech giants are witnessing a dream start to the year. The Nasdaq Golden Dragon China Index — a popular index tracking Chinese firms listed in the United States — soared 13% in the first two trading days of 2023, marking its best start to a year on record, according to data compiled by Refinitiv dating back to 2003. US-listed shares of Chinese e-commerce firms Alibaba (BABA), JD.com (JD) and Pinduoduo (PDD) added $53 billion to their combined market value on Wednesday. So far this week, their market cap has increased by nearly $70 billion. In...