Get these questions clear first

None of the four routes is simply better; it depends on the stage of your property, the floor area and your budget. KNX is the international bus standard: the most stable and most expandable, ideal for villas and large apartments planned before first-fix electrical work, and the most expensive. RS-485 is widely used by domestic manufacturers — stability close to KNX at lower cost, though cross-brand interoperability is weaker. Wireless ecosystems such as Tuya are flexible and need almost no cabling, which suits homes that are already decorated; the device and app ecosystem is broad. Pure wireless (Zigbee / Bluetooth Mesh) is cheapest and fastest to start with — good for single-point retrofits or a light first step. Our approach is to design per space: a bus backbone for stability and service life, wireless at the edges for flexibility. The first proposal always includes a point schedule and tiered pricing, so you decide which part goes in first.

Yes, but it needs a gateway and a protocol translation layer. The Tuya ecosystem already covers a large number of third-party brands and can be managed in one app; running two ecosystems side by side (for example Tuya and KNX in the same project) requires gateway bridging to translate the different protocols into one command set. Yijia implements all five lines — KNX, Tuya, Tmall Qianwen, Aoogee and RS-485 — so mixed integration is routine work for us, not an extra risk.

Both are platform ecosystems; the difference lies in the interaction entry point and the partner structure. Tmall Qianwen focuses on natural voice and visual interaction and brings in Tmall Genie voice capability — a good fit for households that value voice control. Tuya has a larger global developer ecosystem, a wider range of compatible devices and easier overseas deployment. Decide based on which voice assistant you rely on and whether overseas use is on the horizon.

It depends on the protocol. KNX and RS-485 execute control logic locally: losing the internet only costs you remote app control and voice assistants, while local panels and sensor interlocks keep working. Cloud-dependent wireless ecosystems lose remote functions, but local scenes and physical switches usually still work. For projects where stability matters, we recommend keeping critical circuits — lighting, curtains, security — on local execution rather than in the cloud.

Three variables drive the budget: floor area, number of control points, and whether professional AV and lighting systems are included. In the Xiamen market: lighting, curtains, network and basic security for a 100–140 m² apartment typically runs to tens of thousands of RMB; a villa over 300 m² with whole-home automation and a private cinema runs from hundreds of thousands to over a million — our Taiwan Mountain Villa project in Xiamen falls into that bracket. Every proposal comes with tiered pricing, so implementation can be phased rather than done all at once.

Once the design is signed off, the quotation covers equipment, consumables, installation, commissioning and programming; AV and lighting work also includes acoustic treatment and lighting design. The scope is locked in the contract and any change goes through a formal variation order. We do not sign low and add costs later — that is written into our company values.

Yes — and most finished homes go wireless, with no breaking into walls: replace switch back boxes with smart panels, add a wireless gateway and sensors, and fit motorised curtain tracks. Only bus-based projects (KNX / RS-485) need cabling in advance, positioned before first-fix electrical work. If the home is already finished but you want bus-level stability, a hybrid of wireless backbone plus bus on critical circuits is available.

Bus-based projects (KNX / RS-485) must be positioned and cabled before first-fix electrical work — they are part of the renovation. Wireless projects can be done before or after. Our advice: once you know you want it, involve us as early as possible — getting it right at the electrical stage costs less and looks better than retrofitting later. The video centre has plenty of unedited installation footage, so you can see a real site before deciding.

An eight-step closed loop: Discovery → Proposal → Site Survey → Contract → Handover → Site Acceptance → Installation & Commissioning → After-sales. The first two steps are free: we prepare an initial concept and design framework. The design is only finalised after the site survey. During construction we issue an approved drawing set, and at completion you receive full as-built documentation — point drawings, configuration tables and the equipment list.

We cover the whole of Fujian province — Xiamen, Fuzhou, Quanzhou, Zhangzhou, Longyan, Putian, Ningde, Sanming and Nanping all have delivered projects, with active and completed work in Xiamen, Fuzhou, Lianjiang, Fuqing and Jiangyin. Projects outside the province are assessed by scale; large commercial spaces (offices, hotels, clubhouses) can be undertaken nationwide.

After-sales service starts at handover, and every service request is logged and tracked under our response procedure. Equipment carries the manufacturer's warranty; workmanship and commissioning warranties are stated in the contract. We still maintain projects delivered more than ten years ago — Huangting Danjun in Lianjiang was completed in 2011 and has run fault-free ever since.

Yes, and contract projects make up a large share of our work. Our scope covers multi-subsystem integration (HVAC, lighting, sensing, access control and surveillance on one platform), AV integration (meeting rooms, lecture halls, stage sound and lighting), clubhouse automation, KTV sound and lighting, indoor golf, hotel guest control and building automation. Integrating existing equipment is routine: RS-485 buses and gateway bridging bring equipment of different generations and brands onto one platform instead of starting over.

No. The core of recessed (no-main-fixture) lighting is layered lighting: ambient, task and accent lighting each doing their job, with dimming and colour tuning to build scenes — not simply conceiling a pendant. Done badly, the places that should be bright are dim and the places that should be soft are glaring. Our lighting design starts from illuminance calculations and scene scripts, then selects and positions the fixtures.

A cinema budget goes mainly to three areas: display (projector or laser TV plus screen), sound (amplifier, speakers and acoustic treatment) and control. Buying the equipment yourself and having us install and calibrate it is fine, but we recommend an acoustic assessment first — in many finished rooms, reverberation and standing-wave problems cannot be solved by changing equipment; they need to be handled during renovation. We build both flush-mounted apartment cinemas and clubhouse-grade projects with 60 m² cinemas and extra-large KTV suites.

We work floor by floor in a staggered programme: 20–30 rooms on a single floor typically take two to three weeks for an RCU guest-control retrofit, with the hotel staying open. We always build a mock-up room first to confirm the result before rolling out. Hotel projects also need the PMS integration method agreed in advance — it directly determines day-to-day operating efficiency.

The technology base is shared; the objectives differ. Homes focus on scene experience (arriving home, cinema, sleep modes); offices focus on efficiency and energy (lighting and HVAC interlocking, meeting room booking displays, desk occupancy sensing); buildings focus on centralised control and energy management. Our work on the 22-storey, 44,000 m² Wangsu Technology office building in Xiamen, the Walton Group headquarters and Ronggang Port Terminal in Jiangyin sits squarely in the office and building domain.

Office buildings can be phased floor by floor or zone by zone — roughly two to three weeks per floor — with business and office work continuing normally. Clubhouses and hotels are better done during a short closure: the programme is shorter but needs booking in advance. We always complete a mock-up floor or room first. The 5,000 m² Ronggang Port service centre and office building and the 22-storey, 44,000 m² Wangsu building were both delivered in phases.