Final answer:
Jiajun's experience in Hong Kong would likely include visiting local or western-style restaurants without the expectation of tipping, and being able to pay with various methods, not just credit cards.
Step-by-step explanation:
Jiajun's dining experience in Hong Kong would most likely reflect the local customs and practices for making payments in restaurants. Although tipping is not a common practice in most of East Asia, including Hong Kong, tourists coming from cultures where tipping is customary might still tip. Meanwhile, while credit cards are widely accepted in urban areas like Hong Kong, it's not the case that this is the only method of payment allowed. Many places also accept cash and mobile payment methods. The exchange rate mentioned is unlikely to be exactly 1:100, as this fluctuates with the financial market. Therefore, the most likely aspect of Jiajun's dining experience that he would share with Kevin is part B: "Once my uncle took me to a western-style modern restaurant in Tsim Sha Tsui..." because it doesn't include the incorrect assumption that tipping is mandatory or the inaccuracy regarding payment methods and exchange rates.