ZAZ 旅行指南

中文版 Chinese version → On December 9, 2025, the plane landed at Haikou Meilan Airport. A friend picked me up, and I stayed at a friend's home. This was the first stop of the Hainan self-driving trip — and the starting point of the whole route. As it happens, December 9 was also the 99th anniversary of Haikou becoming a city — on December 9, 1926, Haikou split off from Qiongshan County and was formally established as a city. A city's birthday falling on the first day of a trip — not a bad opening. 1. Its fate is written in its name Haikou was known in ancient times as Baisha Jin and Haikou Pu, and its nickname is "Coconut City." The name itself is geography: "Haikou" means the mouth of the Nandu River where it meets the sea. The city grew where river and sea meet — a port in its very bones. In the Tang dynasty, Baisha Jin was set up here — an ancient ferry post outside Qiongzhou city, a port for crossing between Qiongzhou and Leizhou and for trade. B...

中文版 Chinese version → This is the author's actual December 2025 self-driving trip in Hainan: flew to Haikou, a friend lent a hybrid car, nearly half a month on the road, based at a friend's home in Shenzhou Peninsula, Wanning, radiating out to Sanya, Wuzhishan, Wenchang, Danzhou, and more. This post follows the actual route, covering how to get there, how to book stays, how to book tickets, and what to eat — for reference. 1. Getting there and getting around the island Fly to Haikou. Land at Haikou Meilan Airport; a friend picked me up. This is the most common way onto the island — Beijing, Shanghai, Guangzhou, Chengdu, Chongqing, Wuhan, Xi'an, and other major cities all have direct flights to Haikou or Sanya. Book tickets on the Flight Manager app or Ctrip; booking ahead usually gets a better price. The return flight left from Haikou back to Luzhou. Self-drive on the island. This time a friend provided a hybrid car (green-plate vehicle) and we drove ourselves for...

中文版 Chinese version → Your coins are right there in your wallet. You can see the balance. But you can't move them — that is a "freeze." Not confiscation, but a hold. This episode answers one question: who can freeze your coins? The answer splits two ways. On the centralized stablecoin side, the USDT and USDC contracts hide a blacklist key, and the issuer can hold your coins in place. On the decentralized stablecoin BTCD side, the collateral sits in a multisig time-locked address on the Bitcoin mainnet, with no custodian in the middle — no one can hold your coins unilaterally — but the rules themselves will liquidate you. This is worth thinking through carefully for anyone who holds coins. Many people assume "coins in my own wallet are mine." But freezing tells you: a visible balance doesn't mean you can move it at any time. Whether you can move it depends on who holds the switch. That is what this episode lays out. 1. USDT's freeze key: who pr...

中文版 Chinese version → What makes a stablecoin worth 1 dollar? The answer isn't in the coin itself — it's in the reserves behind it. This episode answers one question: what's actually behind USDT, USDC, and BTCD? In everyday use, a stablecoin works like a "digital dollar" — transfers, savings, and trading all depend on it. But behind the same 1 dollar, different stablecoins hold completely different things. Until you understand the reserves, you don't really understand what you're holding. This is the first episode of the series, and it starts with the most basic question: where is a stablecoin's value anchored? Later episodes go on to freezing, depegging, and other specifics. 1. Centralized stablecoins: how USDT and USDC hold their reserves USDT and USDC are issued by companies. Every coin you hold corresponds to a reserve asset on the issuer's books. The coin holds 1 dollar because of that reserve — in theory, you can redeem your coins w...