In 2005, China had sent its fleet of Israeli built Harpy drones back to Israel for upgradation to Harop standard. The United States of America saw it as an opportunity to deprive China of UAV capabilities and exerted diplomatic pressure on Israel to violate and nullify the deal by not returning the drones to China, let alone upgrade it.
Israel meanwhile didn’t want to be kicked out of lion’s share of sales to China in the field of radars and missiles, returned the drones to avoid angering China, and refused to upgrade the drone to avoid angering America. However, the US after feeling betrayed by the Israelis, kicked them out of Joint Strike Fighter (F-35) program, because the Harpy drones could potentially threaten American surveillance radars and crucial Taiwanese military targets.
Israel, desperate to acquire stealth fifth generation planes decided to appease USA. They sold the Harpy technology to Taiwan, from which Taiwan made its own indigenous drone named Jian Hsiang, so that Taiwan, too, may be able to target vital Chinese installations.
Result is as shown below in the two images
The range of Taiwanese drones is the same as Harpy (500kms), and guess what, that same year, Israel was back in the Joint Strike Fighter program. The USA was pleased that Taiwan too can deal a significant blow at a fraction of the cost of a high-tech fighter plane.
In addition, this sale in a way helped the United States of America to continue posing neutral on “One China Policy”. Taiwan however, is mass producing the drones and poses quite a threat to Chinese Military installations.
Israel simply got around it by selling the deadly technology unofficially to Taiwan, at the same time wooing Americans. Interestingly, the Chinese too reverse engineered, a Harpy drone called ASN-301, which is probably designed for export and has a range of 288kms (probably keeping in mind MTCR regulations of capping the range of standoff munitions to less than 300kms).
Thanks to rift between America and Israel, now both China as well as Taiwan have local swarm drone Technology based on Israeli Harpy.