The first type: catch rare species, catch aliens, and sell pets. Just like the gameplay of Pokémon, you can catch all the monsters you encounter on the map. If you catch a rare pet or an alien pet of high value, you can sell it for a lot of diamonds in the store, which is the first pot of gold for early exploration.
The second type: When playing dungeons (psychic, World of Warcraft) and looking through boxes, there is a chance of dropping diamonds.
The third type: fight in foreign lands. A foreign messenger will randomly appear on each hour map, and there is a chance of dropping diamonds after a successful challenge.
The fourth method: Open the daily character bag. If you buy a daily character bag in the gold coin shop, there is a chance of getting diamonds.
The fifth type: It is also more cost-effective. It is the annual card output. If you reach 100 active points every day, you can receive 200 diamonds (this is a conditional micro-krypton consideration. Civilians can take their time if they have the first charge. After all, the liver can replenish krypton).