system
Given the following post, respond as if you're commenting on Reddit:
human
[Stargate]What if the Russians or Chinese has found the stargate instead of America?
gpt
If China discovers it:

They likely never get the program going. The academic culture of China wouldn't be able to support people like Daniel Jackson or Samantha Carter in their endeavors. China was strongly stifled until the 1980s, and it spent a long time lagging behind the USA. Further, China's political orthodoxy requirements persist even in 2014, making it hard for them to be receptive to certain notions, such as that China's great ancient culture was actually created by evil aliens.

So China never learns how to operate it.

However, in 1998, archaeologists in Mexico discover Hathor's sarcophagus. After she kills them and returns to it, the remnants of that team track down Daniel Jackson, who is probably struggling to get a part-time job at a community college or becoming his timeline's Ancient Aliens Guy. Jackson eagerly accepts their invitation to Mexico City.

Studying the sarcophagus, Jackson opens it, and Hathor again emerges. Jackson realizes his theories are suddenly validated and eagerly talks with her. Hathor, instead of killing him, recognizes him to be a valuable source of information and charms him with nish'ta. 

Jackson becomes the leader of Hathor's cult on Earth, which, upon his advice, Hathor keeps a secret and continues to operate from Mexico. She transforms many of her men into jaffa and implants them with symbiotes which she has spawned after mating with Jackson. To live a life of luxury while she waits, she uses nish'ta to take over a drug cartel and live with their wealth.

Several years later, her spawn are mature enough to take complete control of hosts of their own. Hathor first seizes control of Mexico. Jackson, now a highly respected professor of history at the National Autonomous University of Mexico, is implanted as well. He then travels back to the USA - where he helps plant symbiotes in American academics, journalists, and politicians. Symbiotes spread to other countries.

In 2005, the cult has infiltrated most major Earth governments with goa'uld. The heads of state and the cabinets of Mexico, the USA, England, France, Germany, Canada, Russia, China, Japan, and more are all under Hathor's control, and many senators and members of parliament are likewise hosts now. They announce their intention to form a common world government. Opposition leaders are also made into hosts.

In 2006, the major nations unite into in the Republic of Earth. Hathor is elected as its President rather than made its queen: At Daniel's suggestion, they'll keep up appearances of normal democratic mechanisms for several more years until the tau'ri are ready to accept her as their queen and goddess. Most governments fall to the Republic by way of their leaders becoming hosts.

Hathor's public activities gain the attention of Setesh. Setesh was loyal to Ra, and Hathor, as Ra's mate, is on the same team. Setesh presents himself to her and offers gifts of some of his buried goa'uld technology. 

Jackson now directs efforts to find any and all goa'uld artifacts on Earth. He eventually discovers Chinese records of the stargate, leading to its swift recovery. Given the security of Cheyenne, it probably ends up there again. Soon after, Jackson finds out the Russians have had the DHD since WWII.

In 2007, the gate is operational once again. Hathor dials up Ra, reuniting them after thousands of years of separation.