Kwa zaka zoposa 19, Guangzhou Teyu Electromechanical Co., Ltd. (wotchedwanso S&A Teyu) ndi bizinesi yokonda zachilengedwe yomwe idakhazikitsidwa mu 2002 ndipo yakhala ikudzipereka pakupanga, R.&D ndi kupanga mafakitale firiji dongosolo. Likululi lili ndi malo okwana 18,000 square metres, ndipo lili ndi antchito pafupifupi 350. Ndi kugulitsa kwapachaka kwa makina ozizirira mpaka mayunitsi 80,000, malondawa agulitsidwa kumayiko ndi zigawo zopitilira 50.
S&Dongosolo lozizira la Teyu limagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana opanga mafakitale, kukonza laser ndi mafakitale azachipatala, monga ma lasers amphamvu kwambiri, ma spindles othamanga kwambiri amadzi, zida zamankhwala ndi madera ena akatswiri. S&Dongosolo lowongolera kutentha kwambiri la Teyu limaperekanso njira zoziziritsira zomwe zimatsata makasitomala pazogwiritsa ntchito zapam'mphepete, monga ma picosecond ndi nanosecond lasers, kafukufuku wa sayansi yachilengedwe, kuyesa kwafizikiki ndi madera ena atsopano.
Ndi zitsanzo zambiri, S&Dongosolo lozizira la Teyu likugwiritsidwa ntchito mochulukirachulukira m'magawo onse ndipo lakhazikitsa chithunzithunzi chabwino kwambiri pamsika ndikuwongolera molondola, kugwiritsa ntchito luntha, kugwiritsa ntchito chitetezo, kuteteza mphamvu ndi kuteteza chilengedwe, komwe kumatchedwa "lndustrial Chiller Expert"